<?xml version="1.0" encoding="UTF-8" ?>
<class name="Environment" inherits="Resource" version="3.6" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
	<brief_description>
		Resource for environment nodes (like [WorldEnvironment]) that define multiple rendering options.
	</brief_description>
	<description>
		Resource for environment nodes (like [WorldEnvironment]) that define multiple environment operations (such as background [Sky] or [Color], ambient light, fog, depth-of-field...). These parameters affect the final render of the scene. The order of these operations is:
		- Depth of Field Blur
		- Glow
		- Tonemap (Auto Exposure)
		- Adjustments
		If the target [Viewport] is set to "2D Without Sampling", all post-processing effects will be unavailable. With "3D Without Effects", the following options will be unavailable:
		- Ssao
		- Ss Reflections
		This can be configured for the root Viewport with [member ProjectSettings.rendering/quality/intended_usage/framebuffer_allocation], or for specific Viewports via the [member Viewport.usage] property.
		Note that [member ProjectSettings.rendering/quality/intended_usage/framebuffer_allocation] has a mobile platform override to use "3D Without Effects" by default. It improves the performance on mobile devices, but at the same time affects the screen display on mobile devices.
	</description>
	<tutorials>
		<link title="Environment and post-processing">$DOCS_URL/tutorials/3d/environment_and_post_processing.html</link>
		<link title="Light transport in game engines">$DOCS_URL/tutorials/3d/high_dynamic_range.html</link>
		<link title="3D Material Testers Demo">https://godotengine.org/asset-library/asset/123</link>
		<link title="2D HDR Demo">https://godotengine.org/asset-library/asset/110</link>
		<link title="Third Person Shooter Demo">https://godotengine.org/asset-library/asset/678</link>
	</tutorials>
	<methods>
		<method name="is_glow_level_enabled" qualifiers="const">
			<return type="bool" />
			<argument index="0" name="idx" type="int" />
			<description>
				Returns [code]true[/code] if the glow level [code]idx[/code] is specified, [code]false[/code] otherwise.
			</description>
		</method>
		<method name="set_glow_level">
			<return type="void" />
			<argument index="0" name="idx" type="int" />
			<argument index="1" name="enabled" type="bool" />
			<description>
				Enables or disables the glow level at index [code]idx[/code]. Each level relies on the previous level. This means that enabling higher glow levels will slow down the glow effect rendering, even if previous levels aren't enabled.
			</description>
		</method>
	</methods>
	<members>
		<member name="adjustment_brightness" type="float" setter="set_adjustment_brightness" getter="get_adjustment_brightness" default="1.0">
			The global brightness value of the rendered scene. Effective only if [code]adjustment_enabled[/code] is [code]true[/code].
		</member>
		<member name="adjustment_color_correction" type="Texture" setter="set_adjustment_color_correction" getter="get_adjustment_color_correction">
			Applies the provided [Texture] resource to affect the global color aspect of the rendered scene. Effective only if [code]adjustment_enabled[/code] is [code]true[/code].
		</member>
		<member name="adjustment_contrast" type="float" setter="set_adjustment_contrast" getter="get_adjustment_contrast" default="1.0">
			The global contrast value of the rendered scene (default value is 1). Effective only if [code]adjustment_enabled[/code] is [code]true[/code].
		</member>
		<member name="adjustment_enabled" type="bool" setter="set_adjustment_enable" getter="is_adjustment_enabled" default="false">
			If [code]true[/code], enables the [code]adjustment_*[/code] properties provided by this resource. If [code]false[/code], modifications to the [code]adjustment_*[/code] properties will have no effect on the rendered scene.
		</member>
		<member name="adjustment_saturation" type="float" setter="set_adjustment_saturation" getter="get_adjustment_saturation" default="1.0">
			The global color saturation value of the rendered scene (default value is 1). Effective only if [code]adjustment_enabled[/code] is [code]true[/code].
		</member>
		<member name="ambient_light_color" type="Color" setter="set_ambient_light_color" getter="get_ambient_light_color" default="Color( 0, 0, 0, 1 )">
			The ambient light's [Color].
		</member>
		<member name="ambient_light_energy" type="float" setter="set_ambient_light_energy" getter="get_ambient_light_energy" default="1.0">
			The ambient light's energy. The higher the value, the stronger the light.
		</member>
		<member name="ambient_light_sky_contribution" type="float" setter="set_ambient_light_sky_contribution" getter="get_ambient_light_sky_contribution" default="1.0">
			Defines the amount of light that the sky brings on the scene. A value of [code]0.0[/code] means that the sky's light emission has no effect on the scene illumination, thus all ambient illumination is provided by the ambient light. On the contrary, a value of [code]1.0[/code] means that [i]all[/i] the light that affects the scene is provided by the sky, thus the ambient light parameter has no effect on the scene.
			[b]Note:[/b] [member ambient_light_sky_contribution] is internally clamped between [code]0.0[/code] and [code]1.0[/code] (inclusive).
		</member>
		<member name="auto_exposure_enabled" type="bool" setter="set_tonemap_auto_exposure" getter="get_tonemap_auto_exposure" default="false">
			If [code]true[/code], enables the tonemapping auto exposure mode of the scene renderer. If [code]true[/code], the renderer will automatically determine the exposure setting to adapt to the scene's illumination and the observed light.
		</member>
		<member name="auto_exposure_max_luma" type="float" setter="set_tonemap_auto_exposure_max" getter="get_tonemap_auto_exposure_max" default="8.0">
			The maximum luminance value for the auto exposure.
		</member>
		<member name="auto_exposure_min_luma" type="float" setter="set_tonemap_auto_exposure_min" getter="get_tonemap_auto_exposure_min" default="0.05">
			The minimum luminance value for the auto exposure.
		</member>
		<member name="auto_exposure_scale" type="float" setter="set_tonemap_auto_exposure_grey" getter="get_tonemap_auto_exposure_grey" default="0.4">
			The scale of the auto exposure effect. Affects the intensity of auto exposure.
		</member>
		<member name="auto_exposure_speed" type="float" setter="set_tonemap_auto_exposure_speed" getter="get_tonemap_auto_exposure_speed" default="0.5">
			The speed of the auto exposure effect. Affects the time needed for the camera to perform auto exposure.
		</member>
		<member name="background_camera_feed_id" type="int" setter="set_camera_feed_id" getter="get_camera_feed_id" default="1">
			The ID of the camera feed to show in the background.
		</member>
		<member name="background_canvas_max_layer" type="int" setter="set_canvas_max_layer" getter="get_canvas_max_layer" default="0">
			The maximum layer ID to display. Only effective when using the [constant BG_CANVAS] background mode.
		</member>
		<member name="background_color" type="Color" setter="set_bg_color" getter="get_bg_color" default="Color( 0, 0, 0, 1 )">
			The [Color] displayed for clear areas of the scene. Only effective when using the [constant BG_COLOR] or [constant BG_COLOR_SKY] background modes).
		</member>
		<member name="background_energy" type="float" setter="set_bg_energy" getter="get_bg_energy" default="1.0">
			The power of the light emitted by the background. This affects the sky brightness, the ambient light (if [member ambient_light_sky_contribution] is greater than [code]0.0[/code]) and specular light from the sky.
		</member>
		<member name="background_mode" type="int" setter="set_background" getter="get_background" enum="Environment.BGMode" default="0">
			The background mode. See [enum BGMode] for possible values.
		</member>
		<member name="background_sky" type="Sky" setter="set_sky" getter="get_sky">
			The [Sky] resource defined as background.
		</member>
		<member name="background_sky_custom_fov" type="float" setter="set_sky_custom_fov" getter="get_sky_custom_fov" default="0.0">
			The [Sky] resource's custom field of view.
		</member>
		<member name="background_sky_orientation" type="Basis" setter="set_sky_orientation" getter="get_sky_orientation" default="Basis( 1, 0, 0, 0, 1, 0, 0, 0, 1 )">
			The [Sky] resource's rotation expressed as a [Basis].
		</member>
		<member name="background_sky_rotation" type="Vector3" setter="set_sky_rotation" getter="get_sky_rotation" default="Vector3( 0, 0, 0 )">
			The [Sky] resource's rotation expressed as Euler angles in radians.
		</member>
		<member name="background_sky_rotation_degrees" type="Vector3" setter="set_sky_rotation_degrees" getter="get_sky_rotation_degrees" default="Vector3( 0, 0, 0 )">
			The [Sky] resource's rotation expressed as Euler angles in degrees.
		</member>
		<member name="dof_blur_far_amount" type="float" setter="set_dof_blur_far_amount" getter="get_dof_blur_far_amount" default="0.1">
			The amount of far blur for the depth-of-field effect.
		</member>
		<member name="dof_blur_far_distance" type="float" setter="set_dof_blur_far_distance" getter="get_dof_blur_far_distance" default="10.0">
			The distance from the camera where the far blur effect affects the rendering.
		</member>
		<member name="dof_blur_far_enabled" type="bool" setter="set_dof_blur_far_enabled" getter="is_dof_blur_far_enabled" default="false">
			If [code]true[/code], enables the depth-of-field far blur effect.
		</member>
		<member name="dof_blur_far_quality" type="int" setter="set_dof_blur_far_quality" getter="get_dof_blur_far_quality" enum="Environment.DOFBlurQuality" default="1">
			The depth-of-field far blur's quality. Higher values can mitigate the visible banding effect seen at higher strengths, but are much slower.
		</member>
		<member name="dof_blur_far_transition" type="float" setter="set_dof_blur_far_transition" getter="get_dof_blur_far_transition" default="5.0">
			The length of the transition between the no-blur area and far blur.
		</member>
		<member name="dof_blur_near_amount" type="float" setter="set_dof_blur_near_amount" getter="get_dof_blur_near_amount" default="0.1">
			The amount of near blur for the depth-of-field effect.
		</member>
		<member name="dof_blur_near_distance" type="float" setter="set_dof_blur_near_distance" getter="get_dof_blur_near_distance" default="2.0">
			Distance from the camera where the near blur effect affects the rendering.
		</member>
		<member name="dof_blur_near_enabled" type="bool" setter="set_dof_blur_near_enabled" getter="is_dof_blur_near_enabled" default="false">
			If [code]true[/code], enables the depth-of-field near blur effect.
		</member>
		<member name="dof_blur_near_quality" type="int" setter="set_dof_blur_near_quality" getter="get_dof_blur_near_quality" enum="Environment.DOFBlurQuality" default="1">
			The depth-of-field near blur's quality. Higher values can mitigate the visible banding effect seen at higher strengths, but are much slower.
		</member>
		<member name="dof_blur_near_transition" type="float" setter="set_dof_blur_near_transition" getter="get_dof_blur_near_transition" default="1.0">
			The length of the transition between the near blur and no-blur area.
		</member>
		<member name="fog_color" type="Color" setter="set_fog_color" getter="get_fog_color" default="Color( 0.5, 0.6, 0.7, 1 )">
			The fog's [Color].
		</member>
		<member name="fog_depth_begin" type="float" setter="set_fog_depth_begin" getter="get_fog_depth_begin" default="10.0">
			The fog's depth starting distance from the camera.
		</member>
		<member name="fog_depth_curve" type="float" setter="set_fog_depth_curve" getter="get_fog_depth_curve" default="1.0">
			The fog depth's intensity curve. A number of presets are available in the [b]Inspector[/b] by right-clicking the curve.
		</member>
		<member name="fog_depth_enabled" type="bool" setter="set_fog_depth_enabled" getter="is_fog_depth_enabled" default="true">
			If [code]true[/code], the depth fog effect is enabled. When enabled, fog will appear in the distance (relative to the camera).
		</member>
		<member name="fog_depth_end" type="float" setter="set_fog_depth_end" getter="get_fog_depth_end" default="100.0">
			The fog's depth end distance from the camera. If this value is set to 0, it will be equal to the current camera's [member Camera.far] value.
		</member>
		<member name="fog_enabled" type="bool" setter="set_fog_enabled" getter="is_fog_enabled" default="false">
			If [code]true[/code], fog effects are enabled. [member fog_height_enabled] and/or [member fog_depth_enabled] must be set to [code]true[/code] to actually display fog.
		</member>
		<member name="fog_height_curve" type="float" setter="set_fog_height_curve" getter="get_fog_height_curve" default="1.0">
			The height fog's intensity. A number of presets are available in the [b]Inspector[/b] by right-clicking the curve.
		</member>
		<member name="fog_height_enabled" type="bool" setter="set_fog_height_enabled" getter="is_fog_height_enabled" default="false">
			If [code]true[/code], the height fog effect is enabled. When enabled, fog will appear in a defined height range, regardless of the distance from the camera. This can be used to simulate "deep water" effects with a lower performance cost compared to a dedicated shader.
		</member>
		<member name="fog_height_max" type="float" setter="set_fog_height_max" getter="get_fog_height_max" default="0.0">
			The Y coordinate where the height fog will be the most intense. If this value is greater than [member fog_height_min], fog will be displayed from bottom to top. Otherwise, it will be displayed from top to bottom.
		</member>
		<member name="fog_height_min" type="float" setter="set_fog_height_min" getter="get_fog_height_min" default="10.0">
			The Y coordinate where the height fog will be the least intense. If this value is greater than [member fog_height_max], fog will be displayed from top to bottom. Otherwise, it will be displayed from bottom to top.
		</member>
		<member name="fog_sun_amount" type="float" setter="set_fog_sun_amount" getter="get_fog_sun_amount" default="0.0">
			The intensity of the depth fog color transition when looking towards the sun. The sun's direction is determined automatically using the DirectionalLight node in the scene.
		</member>
		<member name="fog_sun_color" type="Color" setter="set_fog_sun_color" getter="get_fog_sun_color" default="Color( 1, 0.9, 0.7, 1 )">
			The depth fog's [Color] when looking towards the sun.
		</member>
		<member name="fog_transmit_curve" type="float" setter="set_fog_transmit_curve" getter="get_fog_transmit_curve" default="1.0">
			The intensity of the fog light transmittance effect. Amount of light that the fog transmits.
		</member>
		<member name="fog_transmit_enabled" type="bool" setter="set_fog_transmit_enabled" getter="is_fog_transmit_enabled" default="false">
			Enables fog's light transmission effect. If [code]true[/code], light will be more visible in the fog to simulate light scattering as in real life.
		</member>
		<member name="glow_bicubic_upscale" type="bool" setter="set_glow_bicubic_upscale" getter="is_glow_bicubic_upscale_enabled" default="false">
			Smooths out the blockiness created by sampling higher levels, at the cost of performance.
			[b]Note:[/b] When using the GLES2 renderer, this is only available if the GPU supports the [code]GL_EXT_gpu_shader4[/code] extension.
		</member>
		<member name="glow_blend_mode" type="int" setter="set_glow_blend_mode" getter="get_glow_blend_mode" enum="Environment.GlowBlendMode" default="2">
			The glow blending mode.
		</member>
		<member name="glow_bloom" type="float" setter="set_glow_bloom" getter="get_glow_bloom" default="0.0">
			The bloom's intensity. If set to a value higher than [code]0[/code], this will make glow visible in areas darker than the [member glow_hdr_threshold].
		</member>
		<member name="glow_enabled" type="bool" setter="set_glow_enabled" getter="is_glow_enabled" default="false">
			If [code]true[/code], the glow effect is enabled.
			[b]Note:[/b] Only effective if [member ProjectSettings.rendering/quality/intended_usage/framebuffer_allocation] is [b]3D[/b] ([i]not[/i] [b]3D Without Effects[/b]). On mobile, [member ProjectSettings.rendering/quality/intended_usage/framebuffer_allocation] defaults to [b]3D Without Effects[/b] by default, so its [code].mobile[/code] override needs to be changed to [b]3D[/b].
			[b]Note:[/b] When using GLES3 on mobile, HDR rendering is disabled by default for performance reasons. This means glow will only be visible if [member glow_hdr_threshold] is decreased below [code]1.0[/code] or if [member glow_bloom] is increased above [code]0.0[/code]. Also consider increasing [member glow_intensity] to [code]1.5[/code]. If you want glow to behave on mobile like it does on desktop (at a performance cost), enable [member ProjectSettings.rendering/quality/depth/hdr]'s [code].mobile[/code] override.
		</member>
		<member name="glow_hdr_luminance_cap" type="float" setter="set_glow_hdr_luminance_cap" getter="get_glow_hdr_luminance_cap" default="12.0">
			The higher threshold of the HDR glow. Areas brighter than this threshold will be clamped for the purposes of the glow effect.
		</member>
		<member name="glow_hdr_scale" type="float" setter="set_glow_hdr_bleed_scale" getter="get_glow_hdr_bleed_scale" default="2.0">
			The bleed scale of the HDR glow.
		</member>
		<member name="glow_hdr_threshold" type="float" setter="set_glow_hdr_bleed_threshold" getter="get_glow_hdr_bleed_threshold" default="1.0">
			The lower threshold of the HDR glow. When using the GLES2 renderer (which doesn't support HDR), this needs to be below [code]1.0[/code] for glow to be visible. A value of [code]0.9[/code] works well in this case.
		</member>
		<member name="glow_high_quality" type="bool" setter="set_glow_high_quality" getter="is_glow_high_quality_enabled" default="false">
			Takes more samples during downsample pass of glow. This ensures that single pixels are captured by glow which makes the glow look smoother and more stable during movement. However, it is very expensive and makes the glow post process take twice as long.
		</member>
		<member name="glow_intensity" type="float" setter="set_glow_intensity" getter="get_glow_intensity" default="0.8">
			The glow intensity. When using the GLES2 renderer, this should be increased to 1.5 to compensate for the lack of HDR rendering.
		</member>
		<member name="glow_levels/1" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="false">
			If [code]true[/code], the 1st level of glow is enabled. This is the most "local" level (least blurry).
		</member>
		<member name="glow_levels/2" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="false">
			If [code]true[/code], the 2th level of glow is enabled.
		</member>
		<member name="glow_levels/3" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="true">
			If [code]true[/code], the 3th level of glow is enabled.
		</member>
		<member name="glow_levels/4" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="false">
			If [code]true[/code], the 4th level of glow is enabled.
		</member>
		<member name="glow_levels/5" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="true">
			If [code]true[/code], the 5th level of glow is enabled.
		</member>
		<member name="glow_levels/6" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="false">
			If [code]true[/code], the 6th level of glow is enabled.
		</member>
		<member name="glow_levels/7" type="bool" setter="set_glow_level" getter="is_glow_level_enabled" default="false">
			If [code]true[/code], the 7th level of glow is enabled. This is the most "global" level (blurriest).
		</member>
		<member name="glow_strength" type="float" setter="set_glow_strength" getter="get_glow_strength" default="1.0">
			The glow strength. When using the GLES2 renderer, this should be increased to 1.3 to compensate for the lack of HDR rendering.
		</member>
		<member name="ss_reflections_depth_tolerance" type="float" setter="set_ssr_depth_tolerance" getter="get_ssr_depth_tolerance" default="0.2">
			The depth tolerance for screen-space reflections.
		</member>
		<member name="ss_reflections_enabled" type="bool" setter="set_ssr_enabled" getter="is_ssr_enabled" default="false">
			If [code]true[/code], screen-space reflections are enabled. Screen-space reflections are more accurate than reflections from [GIProbe]s or [ReflectionProbe]s, but are slower and can't reflect surfaces occluded by others.
		</member>
		<member name="ss_reflections_fade_in" type="float" setter="set_ssr_fade_in" getter="get_ssr_fade_in" default="0.15">
			The fade-in distance for screen-space reflections. Affects the area from the reflected material to the screen-space reflection).
		</member>
		<member name="ss_reflections_fade_out" type="float" setter="set_ssr_fade_out" getter="get_ssr_fade_out" default="2.0">
			The fade-out distance for screen-space reflections. Affects the area from the screen-space reflection to the "global" reflection.
		</member>
		<member name="ss_reflections_max_steps" type="int" setter="set_ssr_max_steps" getter="get_ssr_max_steps" default="64">
			The maximum number of steps for screen-space reflections. Higher values are slower.
		</member>
		<member name="ss_reflections_roughness" type="bool" setter="set_ssr_rough" getter="is_ssr_rough" default="true">
			If [code]true[/code], screen-space reflections will take the material roughness into account.
		</member>
		<member name="ssao_ao_channel_affect" type="float" setter="set_ssao_ao_channel_affect" getter="get_ssao_ao_channel_affect" default="0.0">
			The screen-space ambient occlusion intensity on materials that have an AO texture defined. Values higher than [code]0[/code] will make the SSAO effect visible in areas darkened by AO textures.
		</member>
		<member name="ssao_bias" type="float" setter="set_ssao_bias" getter="get_ssao_bias" default="0.01">
			The screen-space ambient occlusion bias. This should be kept high enough to prevent "smooth" curves from being affected by ambient occlusion.
		</member>
		<member name="ssao_blur" type="int" setter="set_ssao_blur" getter="get_ssao_blur" enum="Environment.SSAOBlur" default="3">
			The screen-space ambient occlusion blur quality. See [enum SSAOBlur] for possible values.
		</member>
		<member name="ssao_color" type="Color" setter="set_ssao_color" getter="get_ssao_color" default="Color( 0, 0, 0, 1 )">
			The screen-space ambient occlusion color.
		</member>
		<member name="ssao_edge_sharpness" type="float" setter="set_ssao_edge_sharpness" getter="get_ssao_edge_sharpness" default="4.0">
			The screen-space ambient occlusion edge sharpness.
		</member>
		<member name="ssao_enabled" type="bool" setter="set_ssao_enabled" getter="is_ssao_enabled" default="false">
			If [code]true[/code], the screen-space ambient occlusion effect is enabled. This darkens objects' corners and cavities to simulate ambient light not reaching the entire object as in real life. This works well for small, dynamic objects, but baked lighting or ambient occlusion textures will do a better job at displaying ambient occlusion on large static objects. This is a costly effect and should be disabled first when running into performance issues.
		</member>
		<member name="ssao_intensity" type="float" setter="set_ssao_intensity" getter="get_ssao_intensity" default="1.0">
			The primary screen-space ambient occlusion intensity. See also [member ssao_radius].
		</member>
		<member name="ssao_intensity2" type="float" setter="set_ssao_intensity2" getter="get_ssao_intensity2" default="1.0">
			The secondary screen-space ambient occlusion intensity. See also [member ssao_radius2].
		</member>
		<member name="ssao_light_affect" type="float" setter="set_ssao_direct_light_affect" getter="get_ssao_direct_light_affect" default="0.0">
			The screen-space ambient occlusion intensity in direct light. In real life, ambient occlusion only applies to indirect light, which means its effects can't be seen in direct light. Values higher than [code]0[/code] will make the SSAO effect visible in direct light.
		</member>
		<member name="ssao_quality" type="int" setter="set_ssao_quality" getter="get_ssao_quality" enum="Environment.SSAOQuality" default="1">
			The screen-space ambient occlusion quality. Higher qualities will make better use of small objects for ambient occlusion, but are slower.
		</member>
		<member name="ssao_radius" type="float" setter="set_ssao_radius" getter="get_ssao_radius" default="1.0">
			The primary screen-space ambient occlusion radius.
		</member>
		<member name="ssao_radius2" type="float" setter="set_ssao_radius2" getter="get_ssao_radius2" default="0.0">
			The secondary screen-space ambient occlusion radius. If set to a value higher than [code]0[/code], enables the secondary screen-space ambient occlusion effect which can be used to improve the effect's appearance (at the cost of performance).
		</member>
		<member name="tonemap_exposure" type="float" setter="set_tonemap_exposure" getter="get_tonemap_exposure" default="1.0">
			The default exposure used for tonemapping.
		</member>
		<member name="tonemap_mode" type="int" setter="set_tonemapper" getter="get_tonemapper" enum="Environment.ToneMapper" default="0">
			The tonemapping mode to use. Tonemapping is the process that "converts" HDR values to be suitable for rendering on a SDR display. (Godot doesn't support rendering on HDR displays yet.)
		</member>
		<member name="tonemap_white" type="float" setter="set_tonemap_white" getter="get_tonemap_white" default="1.0">
			The white reference value for tonemapping. Only effective if the [member tonemap_mode] isn't set to [constant TONE_MAPPER_LINEAR].
		</member>
	</members>
	<constants>
		<constant name="BG_KEEP" value="5" enum="BGMode">
			Keeps on screen every pixel drawn in the background. Only select this mode if you really need to keep the old data. On modern GPUs it will generally not be faster than clearing the background, and can be significantly slower, particularly on mobile.
			It can only be safely used in fully-interior scenes (no visible sky or sky reflections). If enabled in a scene where the background is visible, "ghost trail" artifacts will be visible when moving the camera.
		</constant>
		<constant name="BG_CLEAR_COLOR" value="0" enum="BGMode">
			Clears the background using the clear color defined in [member ProjectSettings.rendering/environment/default_clear_color].
		</constant>
		<constant name="BG_COLOR" value="1" enum="BGMode">
			Clears the background using a custom clear color.
		</constant>
		<constant name="BG_SKY" value="2" enum="BGMode">
			Displays a user-defined sky in the background.
		</constant>
		<constant name="BG_COLOR_SKY" value="3" enum="BGMode">
			Clears the background using a custom clear color and allows defining a sky for shading and reflection. This mode is slightly faster than [constant BG_SKY] and should be preferred in scenes where reflections can be visible, but the sky itself never is (e.g. top-down camera).
		</constant>
		<constant name="BG_CANVAS" value="4" enum="BGMode">
			Displays a [CanvasLayer] in the background.
		</constant>
		<constant name="BG_CAMERA_FEED" value="6" enum="BGMode">
			Displays a camera feed in the background.
		</constant>
		<constant name="BG_MAX" value="7" enum="BGMode">
			Represents the size of the [enum BGMode] enum.
		</constant>
		<constant name="GLOW_BLEND_MODE_ADDITIVE" value="0" enum="GlowBlendMode">
			Additive glow blending mode. Mostly used for particles, glows (bloom), lens flare, bright sources.
		</constant>
		<constant name="GLOW_BLEND_MODE_SCREEN" value="1" enum="GlowBlendMode">
			Screen glow blending mode. Increases brightness, used frequently with bloom.
		</constant>
		<constant name="GLOW_BLEND_MODE_SOFTLIGHT" value="2" enum="GlowBlendMode">
			Soft light glow blending mode. Modifies contrast, exposes shadows and highlights (vivid bloom).
		</constant>
		<constant name="GLOW_BLEND_MODE_REPLACE" value="3" enum="GlowBlendMode">
			Replace glow blending mode. Replaces all pixels' color by the glow value. This can be used to simulate a full-screen blur effect by tweaking the glow parameters to match the original image's brightness.
		</constant>
		<constant name="TONE_MAPPER_LINEAR" value="0" enum="ToneMapper">
			Linear tonemapper operator. Reads the linear data and passes it on unmodified. This can cause bright lighting to look blown out, with noticeable clipping in the output colors.
		</constant>
		<constant name="TONE_MAPPER_REINHARDT" value="1" enum="ToneMapper">
			Reinhardt tonemapper operator. Performs a variation on rendered pixels' colors by this formula: [code]color = color / (1 + color)[/code]. This avoids clipping bright highlights, but the resulting image can look a bit dull.
		</constant>
		<constant name="TONE_MAPPER_FILMIC" value="2" enum="ToneMapper">
			Filmic tonemapper operator. This avoids clipping bright highlights, with a resulting image that usually looks more vivid than [constant TONE_MAPPER_REINHARDT].
		</constant>
		<constant name="TONE_MAPPER_ACES" value="3" enum="ToneMapper">
			Use the legacy Godot version of the Academy Color Encoding System tonemapper. Unlike [constant TONE_MAPPER_ACES_FITTED], this version of ACES does not handle bright lighting in a physically accurate way. ACES typically has a more contrasted output compared to [constant TONE_MAPPER_REINHARDT] and [constant TONE_MAPPER_FILMIC].
			[b]Note:[/b] This tonemapping operator will be removed in Godot 4.0 in favor of the more accurate [constant TONE_MAPPER_ACES_FITTED].
		</constant>
		<constant name="TONE_MAPPER_ACES_FITTED" value="4" enum="ToneMapper">
			Use the Academy Color Encoding System tonemapper. ACES is slightly more expensive than other options, but it handles bright lighting in a more realistic fashion by desaturating it as it becomes brighter. ACES typically has a more contrasted output compared to [constant TONE_MAPPER_REINHARDT] and [constant TONE_MAPPER_FILMIC].
		</constant>
		<constant name="DOF_BLUR_QUALITY_LOW" value="0" enum="DOFBlurQuality">
			Low depth-of-field blur quality (fastest).
		</constant>
		<constant name="DOF_BLUR_QUALITY_MEDIUM" value="1" enum="DOFBlurQuality">
			Medium depth-of-field blur quality.
		</constant>
		<constant name="DOF_BLUR_QUALITY_HIGH" value="2" enum="DOFBlurQuality">
			High depth-of-field blur quality (slowest).
		</constant>
		<constant name="SSAO_BLUR_DISABLED" value="0" enum="SSAOBlur">
			No blur for the screen-space ambient occlusion effect (fastest).
		</constant>
		<constant name="SSAO_BLUR_1x1" value="1" enum="SSAOBlur">
			1×1 blur for the screen-space ambient occlusion effect.
		</constant>
		<constant name="SSAO_BLUR_2x2" value="2" enum="SSAOBlur">
			2×2 blur for the screen-space ambient occlusion effect.
		</constant>
		<constant name="SSAO_BLUR_3x3" value="3" enum="SSAOBlur">
			3×3 blur for the screen-space ambient occlusion effect (slowest).
		</constant>
		<constant name="SSAO_QUALITY_LOW" value="0" enum="SSAOQuality">
			Low quality for the screen-space ambient occlusion effect (fastest).
		</constant>
		<constant name="SSAO_QUALITY_MEDIUM" value="1" enum="SSAOQuality">
			Medium quality for the screen-space ambient occlusion effect.
		</constant>
		<constant name="SSAO_QUALITY_HIGH" value="2" enum="SSAOQuality">
			High quality for the screen-space ambient occlusion effect (slowest).
		</constant>
	</constants>
</class>
