diff --git a/doc/classes/Light3D.xml b/doc/classes/Light3D.xml index a058611915e..0350d09dfd6 100644 --- a/doc/classes/Light3D.xml +++ b/doc/classes/Light3D.xml @@ -28,6 +28,23 @@ + + The distance from the camera at which the light begins to fade away (in 3D units). + [b]Note:[/b] Only effective for [OmniLight3D] and [SpotLight3D]. + + + If [code]true[/code], the light will smoothly fade away when far from the active [Camera3D] starting at [member distance_fade_begin]. This acts as a form of level of detail (LOD). The light will fade out over [member distance_fade_begin] + [member distance_fade_length], after which it will be culled and not sent to the shader at all. Use this to reduce the number of active lights in a scene and thus improve performance. + [b]Note:[/b] Only effective for [OmniLight3D] and [SpotLight3D]. + + + Distance over which the light fades. The light's energy is progressively reduced over this distance and is completely invisible at the end. + [b]Note:[/b] Only effective for [OmniLight3D] and [SpotLight3D]. + + + The distance from the camera at which the light's shadow cuts off (in 3D units). Set this to a value lower than [member distance_fade_begin] + [member distance_fade_length] to further improve performance, as shadow rendering is often more expensive than light rendering itself. + [b]Note:[/b] Only effective for [OmniLight3D] and [SpotLight3D], and only when [member shadow_enabled] is [code]true[/code]. + [b]Note:[/b] Due to a rendering engine limitation, shadows will be disabled instantly instead of fading smoothly according to [member distance_fade_length]. This may result in visible pop-in depending on the scene topography. + If [code]true[/code], the light only appears in the editor and will not be visible at runtime. @@ -73,7 +90,7 @@ The color of shadows cast by this light. - If [code]true[/code], the light will cast shadows. + If [code]true[/code], the light will cast real-time shadows. This has a significant performance cost. Only enable shadow rendering when it makes a noticeable difference in the scene's appearance, and consider using [member distance_fade_enabled] to hide the light when far away from the [Camera3D]. diff --git a/doc/classes/RenderingServer.xml b/doc/classes/RenderingServer.xml index bb8aa8c9db8..07e7ebc55be 100644 --- a/doc/classes/RenderingServer.xml +++ b/doc/classes/RenderingServer.xml @@ -1650,6 +1650,17 @@ Sets the cull mask for this Light3D. Lights only affect objects in the selected layers. Equivalent to [member Light3D.light_cull_mask]. + + + + + + + + + Sets the distance fade for this Light3D. This acts as a form of level of detail (LOD) and can be used to improve performance. Equivalent to [member Light3D.distance_fade_enabled], [member Light3D.distance_fade_begin], [member Light3D.distance_fade_shadow], and [member Light3D.distance_fade_length]. + + diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp index abbba13ee64..8e0b7bc9b85 100644 --- a/drivers/gles3/rasterizer_storage_gles3.cpp +++ b/drivers/gles3/rasterizer_storage_gles3.cpp @@ -2267,6 +2267,9 @@ void RasterizerStorageGLES3::light_set_negative(RID p_light, bool p_enable) { void RasterizerStorageGLES3::light_set_cull_mask(RID p_light, uint32_t p_mask) { } +void RasterizerStorageGLES3::light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) { +} + void RasterizerStorageGLES3::light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) { } diff --git a/drivers/gles3/rasterizer_storage_gles3.h b/drivers/gles3/rasterizer_storage_gles3.h index b6a5c0e73e0..462c6af89fd 100644 --- a/drivers/gles3/rasterizer_storage_gles3.h +++ b/drivers/gles3/rasterizer_storage_gles3.h @@ -902,6 +902,7 @@ public: void light_set_projector(RID p_light, RID p_texture) override; void light_set_negative(RID p_light, bool p_enable) override; void light_set_cull_mask(RID p_light, uint32_t p_mask) override; + void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) override; void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) override; void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) override; void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) override; diff --git a/scene/3d/light_3d.cpp b/scene/3d/light_3d.cpp index b2e605a262d..0dd3fc8a23b 100644 --- a/scene/3d/light_3d.cpp +++ b/scene/3d/light_3d.cpp @@ -74,6 +74,43 @@ bool Light3D::is_negative() const { return negative; } +void Light3D::set_enable_distance_fade(bool p_enable) { + distance_fade_enabled = p_enable; + RS::get_singleton()->light_set_distance_fade(light, distance_fade_enabled, distance_fade_begin, distance_fade_shadow, distance_fade_length); + notify_property_list_changed(); +} + +bool Light3D::is_distance_fade_enabled() const { + return distance_fade_enabled; +} + +void Light3D::set_distance_fade_begin(real_t p_distance) { + distance_fade_begin = p_distance; + RS::get_singleton()->light_set_distance_fade(light, distance_fade_enabled, distance_fade_begin, distance_fade_shadow, distance_fade_length); +} + +real_t Light3D::get_distance_fade_begin() const { + return distance_fade_begin; +} + +void Light3D::set_distance_fade_shadow(real_t p_distance) { + distance_fade_shadow = p_distance; + RS::get_singleton()->light_set_distance_fade(light, distance_fade_enabled, distance_fade_begin, distance_fade_shadow, distance_fade_length); +} + +real_t Light3D::get_distance_fade_shadow() const { + return distance_fade_shadow; +} + +void Light3D::set_distance_fade_length(real_t p_length) { + distance_fade_length = p_length; + RS::get_singleton()->light_set_distance_fade(light, distance_fade_enabled, distance_fade_begin, distance_fade_shadow, distance_fade_length); +} + +real_t Light3D::get_distance_fade_length() const { + return distance_fade_length; +} + void Light3D::set_cull_mask(uint32_t p_cull_mask) { cull_mask = p_cull_mask; RS::get_singleton()->light_set_cull_mask(light, p_cull_mask); @@ -195,7 +232,7 @@ bool Light3D::is_editor_only() const { } void Light3D::_validate_property(PropertyInfo &property) const { - if (!shadow && (property.name == "shadow_color" || property.name == "shadow_bias" || property.name == "shadow_normal_bias" || property.name == "shadow_reverse_cull_face" || property.name == "shadow_transmittance_bias" || property.name == "shadow_fog_fade" || property.name == "shadow_blur")) { + if (!shadow && (property.name == "shadow_color" || property.name == "shadow_bias" || property.name == "shadow_normal_bias" || property.name == "shadow_reverse_cull_face" || property.name == "shadow_transmittance_bias" || property.name == "shadow_fog_fade" || property.name == "shadow_blur" || property.name == "distance_fade_shadow")) { property.usage = PROPERTY_USAGE_NO_EDITOR; } @@ -203,6 +240,11 @@ void Light3D::_validate_property(PropertyInfo &property) const { // Angular distance is only used in DirectionalLight3D. property.usage = PROPERTY_USAGE_NONE; } + + if (!distance_fade_enabled && (property.name == "distance_fade_begin" || property.name == "distance_fade_shadow" || property.name == "distance_fade_length")) { + property.usage = PROPERTY_USAGE_NO_EDITOR; + } + VisualInstance3D::_validate_property(property); } @@ -222,6 +264,18 @@ void Light3D::_bind_methods() { ClassDB::bind_method(D_METHOD("set_cull_mask", "cull_mask"), &Light3D::set_cull_mask); ClassDB::bind_method(D_METHOD("get_cull_mask"), &Light3D::get_cull_mask); + ClassDB::bind_method(D_METHOD("set_enable_distance_fade", "enable"), &Light3D::set_enable_distance_fade); + ClassDB::bind_method(D_METHOD("is_distance_fade_enabled"), &Light3D::is_distance_fade_enabled); + + ClassDB::bind_method(D_METHOD("set_distance_fade_begin", "distance"), &Light3D::set_distance_fade_begin); + ClassDB::bind_method(D_METHOD("get_distance_fade_begin"), &Light3D::get_distance_fade_begin); + + ClassDB::bind_method(D_METHOD("set_distance_fade_shadow", "distance"), &Light3D::set_distance_fade_shadow); + ClassDB::bind_method(D_METHOD("get_distance_fade_shadow"), &Light3D::get_distance_fade_shadow); + + ClassDB::bind_method(D_METHOD("set_distance_fade_length", "distance"), &Light3D::set_distance_fade_length); + ClassDB::bind_method(D_METHOD("get_distance_fade_length"), &Light3D::get_distance_fade_length); + ClassDB::bind_method(D_METHOD("set_color", "color"), &Light3D::set_color); ClassDB::bind_method(D_METHOD("get_color"), &Light3D::get_color); @@ -257,6 +311,11 @@ void Light3D::_bind_methods() { ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "shadow_transmittance_bias", PROPERTY_HINT_RANGE, "-16,16,0.01"), "set_param", "get_param", PARAM_TRANSMITTANCE_BIAS); ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "shadow_fog_fade", PROPERTY_HINT_RANGE, "0.01,10,0.01"), "set_param", "get_param", PARAM_SHADOW_VOLUMETRIC_FOG_FADE); ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "shadow_blur", PROPERTY_HINT_RANGE, "0.1,8,0.01"), "set_param", "get_param", PARAM_SHADOW_BLUR); + ADD_GROUP("Distance Fade", "distance_fade_"); + ADD_PROPERTY(PropertyInfo(Variant::BOOL, "distance_fade_enabled"), "set_enable_distance_fade", "is_distance_fade_enabled"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "distance_fade_begin", PROPERTY_HINT_RANGE, "0.0,4096.0,0.01,or_greater"), "set_distance_fade_begin", "get_distance_fade_begin"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "distance_fade_shadow", PROPERTY_HINT_RANGE, "0.0,4096.0,0.01,or_greater"), "set_distance_fade_shadow", "get_distance_fade_shadow"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "distance_fade_length", PROPERTY_HINT_RANGE, "0.0,4096.0,0.01,or_greater"), "set_distance_fade_length", "get_distance_fade_length"); ADD_GROUP("Editor", ""); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "editor_only"), "set_editor_only", "is_editor_only"); ADD_GROUP("", ""); @@ -391,6 +450,12 @@ void DirectionalLight3D::_validate_property(PropertyInfo &property) const { property.usage = PROPERTY_USAGE_NONE; } + if (property.name == "distance_fade_enabled" || property.name == "distance_fade_begin" || property.name == "distance_fade_shadow" || property.name == "distance_fade_length") { + // Not relevant for DirectionalLight3D, as the light LOD system only pertains to point lights. + // For DirectionalLight3D, `directional_shadow_max_distance` can be used instead. + property.usage = PROPERTY_USAGE_NONE; + } + Light3D::_validate_property(property); } diff --git a/scene/3d/light_3d.h b/scene/3d/light_3d.h index d5d2aee43de..21d785e2f77 100644 --- a/scene/3d/light_3d.h +++ b/scene/3d/light_3d.h @@ -75,6 +75,10 @@ private: bool negative = false; bool reverse_cull = false; uint32_t cull_mask = 0; + bool distance_fade_enabled = false; + real_t distance_fade_begin = 40.0; + real_t distance_fade_shadow = 50.0; + real_t distance_fade_length = 10.0; RS::LightType type = RenderingServer::LIGHT_DIRECTIONAL; bool editor_only = false; void _update_visibility(); @@ -107,6 +111,18 @@ public: void set_negative(bool p_enable); bool is_negative() const; + void set_enable_distance_fade(bool p_enable); + bool is_distance_fade_enabled() const; + + void set_distance_fade_begin(real_t p_distance); + real_t get_distance_fade_begin() const; + + void set_distance_fade_shadow(real_t p_distance); + real_t get_distance_fade_shadow() const; + + void set_distance_fade_length(real_t p_length); + real_t get_distance_fade_length() const; + void set_cull_mask(uint32_t p_cull_mask); uint32_t get_cull_mask() const; diff --git a/servers/rendering/rasterizer_dummy.h b/servers/rendering/rasterizer_dummy.h index 74c080660d9..987f2f4342a 100644 --- a/servers/rendering/rasterizer_dummy.h +++ b/servers/rendering/rasterizer_dummy.h @@ -412,6 +412,7 @@ public: void light_set_projector(RID p_light, RID p_texture) override {} void light_set_negative(RID p_light, bool p_enable) override {} void light_set_cull_mask(RID p_light, uint32_t p_mask) override {} + void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) override {} void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) override {} void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) override {} void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) override {} diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp index 948340f469f..92f1286d52d 100644 --- a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp +++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp @@ -3440,8 +3440,22 @@ void RendererSceneRenderRD::_setup_lights(const PagedArray &p_lights, const continue; } + const real_t distance = camera_plane.distance_to(li->transform.origin); + + if (storage->light_is_distance_fade_enabled(li->light)) { + const float fade_begin = storage->light_get_distance_fade_begin(li->light); + const float fade_length = storage->light_get_distance_fade_length(li->light); + + if (distance > fade_begin) { + if (distance > fade_begin + fade_length) { + // Out of range, don't draw this light to improve performance. + continue; + } + } + } + cluster.omni_light_sort[cluster.omni_light_count].instance = li; - cluster.omni_light_sort[cluster.omni_light_count].depth = camera_plane.distance_to(li->transform.origin); + cluster.omni_light_sort[cluster.omni_light_count].depth = distance; cluster.omni_light_count++; } break; case RS::LIGHT_SPOT: { @@ -3449,8 +3463,22 @@ void RendererSceneRenderRD::_setup_lights(const PagedArray &p_lights, const continue; } + const real_t distance = camera_plane.distance_to(li->transform.origin); + + if (storage->light_is_distance_fade_enabled(li->light)) { + const float fade_begin = storage->light_get_distance_fade_begin(li->light); + const float fade_length = storage->light_get_distance_fade_length(li->light); + + if (distance > fade_begin) { + if (distance > fade_begin + fade_length) { + // Out of range, don't draw this light to improve performance. + continue; + } + } + } + cluster.spot_light_sort[cluster.spot_light_count].instance = li; - cluster.spot_light_sort[cluster.spot_light_count].depth = camera_plane.distance_to(li->transform.origin); + cluster.spot_light_sort[cluster.spot_light_count].depth = distance; cluster.spot_light_count++; } break; } @@ -3494,7 +3522,24 @@ void RendererSceneRenderRD::_setup_lights(const PagedArray &p_lights, const light_data.attenuation = storage->light_get_param(base, RS::LIGHT_PARAM_ATTENUATION); - float energy = sign * storage->light_get_param(base, RS::LIGHT_PARAM_ENERGY) * Math_PI; + // Reuse fade begin, fade length and distance for shadow LOD determination later. + float fade_begin = 0.0; + float fade_length = 0.0; + real_t distance = 0.0; + + float fade = 1.0; + if (storage->light_is_distance_fade_enabled(li->light)) { + fade_begin = storage->light_get_distance_fade_begin(li->light); + fade_length = storage->light_get_distance_fade_length(li->light); + distance = camera_plane.distance_to(li->transform.origin); + + if (distance > fade_begin) { + // Use `smoothstep()` to make opacity changes more gradual and less noticeable to the player. + fade = Math::smoothstep(0.0f, 1.0f, 1.0f - float(distance - fade_begin) / fade_length); + } + } + + float energy = sign * storage->light_get_param(base, RS::LIGHT_PARAM_ENERGY) * Math_PI * fade; light_data.color[0] = linear_col.r * energy; light_data.color[1] = linear_col.g * energy; @@ -3555,7 +3600,17 @@ void RendererSceneRenderRD::_setup_lights(const PagedArray &p_lights, const light_data.projector_rect[3] = 0; } - if (shadow_atlas && shadow_atlas->shadow_owners.has(li->self)) { + const bool needs_shadow = shadow_atlas && shadow_atlas->shadow_owners.has(li->self); + + bool in_shadow_range = true; + if (needs_shadow && storage->light_is_distance_fade_enabled(li->light)) { + if (distance > storage->light_get_distance_fade_shadow(li->light)) { + // Out of range, don't draw shadows to improve performance. + in_shadow_range = false; + } + } + + if (needs_shadow && in_shadow_range) { // fill in the shadow information light_data.shadow_enabled = true; diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.cpp b/servers/rendering/renderer_rd/renderer_storage_rd.cpp index 1473a92a1a5..35aa0f1f31c 100644 --- a/servers/rendering/renderer_rd/renderer_storage_rd.cpp +++ b/servers/rendering/renderer_rd/renderer_storage_rd.cpp @@ -6600,6 +6600,16 @@ void RendererStorageRD::light_set_cull_mask(RID p_light, uint32_t p_mask) { light->dependency.changed_notify(DEPENDENCY_CHANGED_LIGHT); } +void RendererStorageRD::light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) { + Light *light = light_owner.get_or_null(p_light); + ERR_FAIL_COND(!light); + + light->distance_fade = p_enabled; + light->distance_fade_begin = p_begin; + light->distance_fade_shadow = p_shadow; + light->distance_fade_length = p_length; +} + void RendererStorageRD::light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) { Light *light = light_owner.get_or_null(p_light); ERR_FAIL_COND(!light); diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.h b/servers/rendering/renderer_rd/renderer_storage_rd.h index 33a3b8e2296..cb35c2bf654 100644 --- a/servers/rendering/renderer_rd/renderer_storage_rd.h +++ b/servers/rendering/renderer_rd/renderer_storage_rd.h @@ -1033,6 +1033,10 @@ private: RS::LightBakeMode bake_mode = RS::LIGHT_BAKE_DYNAMIC; uint32_t max_sdfgi_cascade = 2; uint32_t cull_mask = 0xFFFFFFFF; + bool distance_fade = false; + real_t distance_fade_begin = 40.0; + real_t distance_fade_shadow = 50.0; + real_t distance_fade_length = 10.0; RS::LightOmniShadowMode omni_shadow_mode = RS::LIGHT_OMNI_SHADOW_DUAL_PARABOLOID; RS::LightDirectionalShadowMode directional_shadow_mode = RS::LIGHT_DIRECTIONAL_SHADOW_ORTHOGONAL; bool directional_blend_splits = false; @@ -1841,6 +1845,7 @@ public: void light_set_projector(RID p_light, RID p_texture); void light_set_negative(RID p_light, bool p_enable); void light_set_cull_mask(RID p_light, uint32_t p_mask); + void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length); void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled); void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode); void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade); @@ -1899,6 +1904,26 @@ public: return light->cull_mask; } + _FORCE_INLINE_ bool light_is_distance_fade_enabled(RID p_light) { + const Light *light = light_owner.get_or_null(p_light); + return light->distance_fade; + } + + _FORCE_INLINE_ float light_get_distance_fade_begin(RID p_light) { + const Light *light = light_owner.get_or_null(p_light); + return light->distance_fade_begin; + } + + _FORCE_INLINE_ float light_get_distance_fade_shadow(RID p_light) { + const Light *light = light_owner.get_or_null(p_light); + return light->distance_fade_shadow; + } + + _FORCE_INLINE_ float light_get_distance_fade_length(RID p_light) { + const Light *light = light_owner.get_or_null(p_light); + return light->distance_fade_length; + } + _FORCE_INLINE_ bool light_has_shadow(RID p_light) const { const Light *light = light_owner.get_or_null(p_light); ERR_FAIL_COND_V(!light, RS::LIGHT_DIRECTIONAL); diff --git a/servers/rendering/renderer_storage.h b/servers/rendering/renderer_storage.h index a2df7ad38ee..762362afed0 100644 --- a/servers/rendering/renderer_storage.h +++ b/servers/rendering/renderer_storage.h @@ -321,6 +321,7 @@ public: virtual void light_set_projector(RID p_light, RID p_texture) = 0; virtual void light_set_negative(RID p_light, bool p_enable) = 0; virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) = 0; + virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) = 0; virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0; virtual void light_set_bake_mode(RID p_light, RS::LightBakeMode p_bake_mode) = 0; virtual void light_set_max_sdfgi_cascade(RID p_light, uint32_t p_cascade) = 0; diff --git a/servers/rendering/rendering_server_default.h b/servers/rendering/rendering_server_default.h index 6d2c36537b5..9ed2b2ad4f2 100644 --- a/servers/rendering/rendering_server_default.h +++ b/servers/rendering/rendering_server_default.h @@ -346,6 +346,7 @@ public: FUNC2(light_set_projector, RID, RID) FUNC2(light_set_negative, RID, bool) FUNC2(light_set_cull_mask, RID, uint32_t) + FUNC5(light_set_distance_fade, RID, bool, float, float, float) FUNC2(light_set_reverse_cull_face_mode, RID, bool) FUNC2(light_set_bake_mode, RID, LightBakeMode) FUNC2(light_set_max_sdfgi_cascade, RID, uint32_t) diff --git a/servers/rendering_server.cpp b/servers/rendering_server.cpp index c9ac42863a3..e07feaab431 100644 --- a/servers/rendering_server.cpp +++ b/servers/rendering_server.cpp @@ -1883,6 +1883,7 @@ void RenderingServer::_bind_methods() { ClassDB::bind_method(D_METHOD("light_set_projector", "light", "texture"), &RenderingServer::light_set_projector); ClassDB::bind_method(D_METHOD("light_set_negative", "light", "enable"), &RenderingServer::light_set_negative); ClassDB::bind_method(D_METHOD("light_set_cull_mask", "light", "mask"), &RenderingServer::light_set_cull_mask); + ClassDB::bind_method(D_METHOD("light_set_distance_fade", "decal", "enabled", "begin", "shadow", "length"), &RenderingServer::light_set_distance_fade); ClassDB::bind_method(D_METHOD("light_set_reverse_cull_face_mode", "light", "enabled"), &RenderingServer::light_set_reverse_cull_face_mode); ClassDB::bind_method(D_METHOD("light_set_bake_mode", "light", "bake_mode"), &RenderingServer::light_set_bake_mode); ClassDB::bind_method(D_METHOD("light_set_max_sdfgi_cascade", "light", "cascade"), &RenderingServer::light_set_max_sdfgi_cascade); diff --git a/servers/rendering_server.h b/servers/rendering_server.h index 5e58afe7182..71460c2d5da 100644 --- a/servers/rendering_server.h +++ b/servers/rendering_server.h @@ -443,6 +443,7 @@ public: virtual void light_set_projector(RID p_light, RID p_texture) = 0; virtual void light_set_negative(RID p_light, bool p_enable) = 0; virtual void light_set_cull_mask(RID p_light, uint32_t p_mask) = 0; + virtual void light_set_distance_fade(RID p_light, bool p_enabled, float p_begin, float p_shadow, float p_length) = 0; virtual void light_set_reverse_cull_face_mode(RID p_light, bool p_enabled) = 0; enum LightBakeMode {