Cycles: Use high value for Transparent BSDF PDF

The transparent BSDF is singular, so MIS shouldn't be applied. Fixes #117657.
2024-02-04 00:07:53 +01:00 · 2024-02-04 00:07:53 +01:00 · 8d7ecd0856
parent 4b108959ba
commit 8d7ecd0856
1 changed files with 3 additions and 2 deletions
--- a/intern/cycles/kernel/closure/bsdf_transparent.h
+++ b/intern/cycles/kernel/closure/bsdf_transparent.h
@ -76,8 +76,9 @@ ccl_device int bsdf_transparent_sample(ccl_private const ShaderClosure *sc,
 {
  // only one direction is possible
  *wo = -wi;
-  *pdf = 1;
-  *eval = one_spectrum();
+  /* Some high number for MIS. */
+  *pdf = 1e6f;
+  *eval = one_spectrum() * 1e6f;
  return LABEL_TRANSMIT | LABEL_TRANSPARENT;
 }