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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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6
servers/rendering/renderer_scene_cull.cpp
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@ -2700,6 +2700,7 @@ void RendererSceneCull::render_camera(const Ref<RenderSceneBuffers> &p_render_bu
ERR_FAIL_NULL(camera);
Vector2 jitter;
float taa_frame_count = 0.0f;
if (p_jitter_phase_count > 0) {
uint32_t current_jitter_count = camera_jitter_array.size();
if (p_jitter_phase_count != current_jitter_count) {
@ -2713,6 +2714,7 @@ void RendererSceneCull::render_camera(const Ref<RenderSceneBuffers> &p_render_bu
}
jitter = camera_jitter_array[RSG::rasterizer->get_frame_number() % p_jitter_phase_count] / p_viewport_size;
taa_frame_count = float(RSG::rasterizer->get_frame_number() % p_jitter_phase_count);
}
RendererSceneRender::CameraData camera_data;
@ -2755,7 +2757,7 @@ void RendererSceneCull::render_camera(const Ref<RenderSceneBuffers> &p_render_bu
} break;
}
camera_data.set_camera(transform, projection, is_orthogonal, vaspect, jitter, camera->visible_layers);
camera_data.set_camera(transform, projection, is_orthogonal, vaspect, jitter, taa_frame_count, camera->visible_layers);
} else {
// Setup our camera for our XR interface.
// We can support multiple views here each with their own camera
@ -2777,7 +2779,7 @@ void RendererSceneCull::render_camera(const Ref<RenderSceneBuffers> &p_render_bu
}
if (view_count == 1) {
camera_data.set_camera(transforms[0], projections[0], false, camera->vaspect, jitter, camera->visible_layers);
camera_data.set_camera(transforms[0], projections[0], false, camera->vaspect, jitter, p_jitter_phase_count, camera->visible_layers);
} else if (view_count == 2) {
camera_data.set_multiview_camera(view_count, transforms, projections, false, camera->vaspect);
} else {