EEVEE-Next: Decorelate Large filter spiral sampling

This avoids correlation artifacts with the jitter pattern itself.
Also try to reduce the visible spiral pattern.

2 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee_next/eevee_film.cc b/source/blender/draw/engines/eevee_next/eevee_film.cc
index cdd753b988d..18e0452da25 100644
--- a/source/blender/draw/engines/eevee_next/eevee_film.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_film.cc
@@ -522,7 +522,7 @@ void Film::update_sample_table()
     int i = 0;
     for (FilmSample &sample : sample_table) {
       /* TODO(fclem): Own RNG. */
-      float2 random_2d = inst_.sampling.rng_2d_get(SAMPLING_FILTER_U);
+      float2 random_2d = inst_.sampling.rng_2d_get(SAMPLING_SSS_U);
       /* This randomization makes sure we converge to the right result but also makes nearest
        * neighbor filtering not converging rapidly. */
       random_2d.x = (random_2d.x + i) / float(FILM_PRECOMP_SAMPLE_MAX);
diff --git a/source/blender/draw/engines/eevee_next/eevee_sampling.cc b/source/blender/draw/engines/eevee_next/eevee_sampling.cc
index aa62c3dd38a..1d320c75f16 100644
--- a/source/blender/draw/engines/eevee_next/eevee_sampling.cc
+++ b/source/blender/draw/engines/eevee_next/eevee_sampling.cc
@@ -177,7 +177,7 @@ float2 Sampling::sample_disk(const float2 &rand)
 float2 Sampling::sample_spiral(const float2 &rand)
 {
   /* Fibonacci spiral. */
-  float omega = M_PI * (1.0f + sqrtf(5.0f)) * rand.x;
+  float omega = 4.0f * M_PI * (1.0f + sqrtf(5.0f)) * rand.x;
   float r = sqrtf(rand.x);
   /* Random rotation. */
   omega += rand.y * 2.0f * M_PI;