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Overhaul screen space reflections.

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This commit is contained in:
Skyth
2025-09-16 15:17:49 +03:00
parent f50d7fa1e8
commit c128886c63
31 changed files with 1185 additions and 934 deletions
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39
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
View File

@@ -1597,6 +1597,12 @@ void fragment_shader(in SceneData scene_data) {
float kernelRoughness2 = min(2.0 * variance, scene_data.roughness_limiter_limit); //limit effect
float filteredRoughness2 = min(1.0, roughness2 + kernelRoughness2);
roughness = sqrt(filteredRoughness2);
// Reject very small roughness values. Lack of precision can collapse
// roughness^4 to 0 in GGX specular equations and cause divisions by zero.
if (roughness < 0.00000001) {
roughness = 0.0;
}
}
#endif
//apply energy conservation
@@ -2029,6 +2035,39 @@ void fragment_shader(in SceneData scene_data) {
#endif
}
//process ssr
if (bool(implementation_data.ss_effects_flags & SCREEN_SPACE_EFFECTS_FLAGS_USE_SSR)) {
bool resolve_ssr = bool(implementation_data.ss_effects_flags & SCREEN_SPACE_EFFECTS_FLAGS_RESOLVE_SSR);
float ssr_mip_level = 0.0;
if (resolve_ssr) {
#ifdef USE_MULTIVIEW
ssr_mip_level = textureLod(sampler2DArray(ssr_mip_level_buffer, SAMPLER_NEAREST_CLAMP), vec3(screen_uv, ViewIndex), 0.0).x;
#else
ssr_mip_level = textureLod(sampler2D(ssr_mip_level_buffer, SAMPLER_NEAREST_CLAMP), screen_uv, 0.0).x;
#endif // USE_MULTIVIEW
ssr_mip_level *= 14.0;
}
#ifdef USE_MULTIVIEW
vec4 ssr = textureLod(sampler2DArray(ssr_buffer, SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP), vec3(screen_uv, ViewIndex), ssr_mip_level);
#else
vec4 ssr = textureLod(sampler2D(ssr_buffer, SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP), screen_uv, ssr_mip_level);
#endif // USE_MULTIVIEW
if (resolve_ssr) {
const vec3 rec709_luminance_weights = vec3(0.2126, 0.7152, 0.0722);
ssr.rgb /= 1.0 - dot(ssr.rgb, rec709_luminance_weights);
}
// Apply fade when approaching 0.7 roughness to smoothen the harsh cutoff in the main SSR trace pass.
ssr *= smoothstep(0.0, 1.0, 1.0 - clamp((roughness - 0.6) / (0.7 - 0.6), 0.0, 1.0));
// Alpha is premultiplied.
indirect_specular_light = indirect_specular_light * (1.0 - ssr.a) + ssr.rgb;
}
//finalize ambient light here
{
ambient_light *= ao;

10
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered_inc.glsl
View File

@@ -164,8 +164,10 @@ layout(set = 0, binding = 2) uniform sampler shadow_sampler;
//3 bits of stride
#define INSTANCE_FLAGS_PARTICLE_TRAIL_MASK 0xFF
#define SCREEN_SPACE_EFFECTS_FLAGS_USE_SSAO 1
#define SCREEN_SPACE_EFFECTS_FLAGS_USE_SSIL 2
#define SCREEN_SPACE_EFFECTS_FLAGS_USE_SSAO (1 << 0)
#define SCREEN_SPACE_EFFECTS_FLAGS_USE_SSIL (1 << 1)
#define SCREEN_SPACE_EFFECTS_FLAGS_USE_SSR (1 << 2)
#define SCREEN_SPACE_EFFECTS_FLAGS_RESOLVE_SSR (1 << 3)
layout(set = 0, binding = 3, std430) restrict readonly buffer OmniLights {
LightData data[];
@@ -435,8 +437,12 @@ layout(set = 1, binding = 33) uniform texture3D volumetric_fog_texture;
#ifdef USE_MULTIVIEW
layout(set = 1, binding = 34) uniform texture2DArray ssil_buffer;
layout(set = 1, binding = 35) uniform texture2DArray ssr_buffer;
layout(set = 1, binding = 36) uniform texture2DArray ssr_mip_level_buffer;
#else
layout(set = 1, binding = 34) uniform texture2D ssil_buffer;
layout(set = 1, binding = 35) uniform texture2D ssr_buffer;
layout(set = 1, binding = 36) uniform texture2D ssr_mip_level_buffer;
#endif // USE_MULTIVIEW
#endif