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Jitter shadow map dithering pattern across frames when TAA is enabled

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This improves shadow quality by reducing the visibility of the noisy
pattern caused by dithering.

This jittering also applies when FSR2 is enabled, as it provides its own
form of temporal antialiasing.

Co-authored-by: Clay John <claynjohn@gmail.com>
This commit is contained in:
Hugo Locurcio 2023-05-26 18:32:01 +02:00 • committed by clayjohn
parent 155fcd00b0
commit 0eb06da057
10 changed files with 54 additions and 47 deletions
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16
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
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@ -1886,7 +1886,7 @@ void fragment_shader(in SceneData scene_data) {
float range_begin = directional_lights.data[i].shadow_range_begin.x;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale1 * test_radius;
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
blend_count++;
}
@ -1902,7 +1902,7 @@ void fragment_shader(in SceneData scene_data) {
float range_begin = directional_lights.data[i].shadow_range_begin.y;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale2 * test_radius;
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
if (blend_count == 0) {
shadow = s;
@ -1927,7 +1927,7 @@ void fragment_shader(in SceneData scene_data) {
float range_begin = directional_lights.data[i].shadow_range_begin.z;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale3 * test_radius;
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
if (blend_count == 0) {
shadow = s;
@ -1952,7 +1952,7 @@ void fragment_shader(in SceneData scene_data) {
float range_begin = directional_lights.data[i].shadow_range_begin.w;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale4 * test_radius;
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
if (blend_count == 0) {
shadow = s;
@ -2003,7 +2003,7 @@ void fragment_shader(in SceneData scene_data) {
pssm_coord /= pssm_coord.w;
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * (blur_factor + (1.0 - blur_factor) * float(directional_lights.data[i].blend_splits)), pssm_coord);
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * (blur_factor + (1.0 - blur_factor) * float(directional_lights.data[i].blend_splits)), pssm_coord, scene_data.taa_frame_count);
if (directional_lights.data[i].blend_splits) {
float pssm_blend;
@ -2037,7 +2037,7 @@ void fragment_shader(in SceneData scene_data) {
pssm_coord /= pssm_coord.w;
float shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * (blur_factor2 + (1.0 - blur_factor2) * float(directional_lights.data[i].blend_splits)), pssm_coord);
float shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * (blur_factor2 + (1.0 - blur_factor2) * float(directional_lights.data[i].blend_splits)), pssm_coord, scene_data.taa_frame_count);
shadow = mix(shadow, shadow2, pssm_blend);
}
}
@ -2220,7 +2220,7 @@ void fragment_shader(in SceneData scene_data) {
continue; // Statically baked light and object uses lightmap, skip
}
float shadow = light_process_omni_shadow(light_index, vertex, normal);
float shadow = light_process_omni_shadow(light_index, vertex, normal, scene_data.taa_frame_count);
shadow = blur_shadow(shadow);
@ -2292,7 +2292,7 @@ void fragment_shader(in SceneData scene_data) {
continue; // Statically baked light and object uses lightmap, skip
}
float shadow = light_process_spot_shadow(light_index, vertex, normal);
float shadow = light_process_spot_shadow(light_index, vertex, normal, scene_data.taa_frame_count);
shadow = blur_shadow(shadow);