three-gpu-pathtracer icon indicating copy to clipboard operation
three-gpu-pathtracer copied to clipboard

Published 20 hours ago • verified publisher icon gkjohnson

Spotlights: Spotlights do no reflect off mirrors

Open gkjohnson opened this issue 2 years ago • 1 comments

Related to #244

Spotlights are currently disabled for non-MIS rendering because with the current implementation the visual result does not match the MIS code path. This means that the spot lights do not bounce from reflections. See the following resources on how to adjust the PDF and implement punctual light sampling:

  • https://www.pbr-book.org/3ed-2018/Light_Sources/Point_Lights#Spotlights
  • https://www.pbr-book.org/3ed-2018/Light_Transport_I_Surface_Reflection/Sampling_Light_Sources#LightswithSingularities

gkjohnson avatar Aug 03 '22 14:08 gkjohnson

Its possible that more bidirectional path tracing capabilities are needed: https://www.pbr-book.org/3ed-2018/Light_Transport_III_Bidirectional_Methods/Bidirectional_Path_Tracing

gkjohnson avatar Dec 17 '22 14:12 gkjohnson