Light Cache Progressive Path Tracing

[Brendon Morfitt]

When Light cache is the primary Indirect and set to progressive path tracing, it must be changed back to single frame BEFORE changing the primary Indirect to anything else ( like irradiance) or it will calculate the pre-pass and stop before rendering the final image, as if 'don't render final image' was checked. If one sets the light cache as the primary Indirect and changes it from 'progressive path-tracing' to 'single frame' and then changes the primary Indirect back to Irradiance, it will resume rendering the final frame as normal.