Ray tracing translucency samples per pixel settings have no visible effect. 

Reported and tested in version 4.25.3(CL 13942748). Tested and found in versions 4.25.3 and 4.26.0 Preview 2(CL 14419252). 

Steps to Reproduce
  1.  Create a basic translucent/glass material
  2.  Apply it to a mesh in the scene.
  3.  Add a Rect Light.
  4.  Add a post process volume.
  5.  In it's Properties, change Translucency mode to Ray Tracing, increase Ray Tracing Translucency Samples Per Pixel to 64, and change Shadows to Area Shadows. 

Result: Ray Tracing Translucency still very noisy.

Expected: Ray Tracing Translucency not as noisy.

Have Comments or More Details?

There's no existing public thread on this issue, so head over to AnswerHub just mention UE-101272 in the post.

Login to Vote

ComponentRendering - Ray Tracing
Affects Versions4.25.34.26
Target Fix4.27
CreatedOct 15, 2020
UpdatedJan 12, 2021