Problem with Direct Light

[gootman]

Hello. I have a problem with direct light in my scene. If i turn on GPU aceleration - render begin with partrasing mode (without light from sun.. only sky envirtorment), if i turn on Partracing with BiDir - sun works again.. What i am doing wrong?

[CTZn]

Single path tracing and exit portals together do not work well with sun light, with or without GPU acceleration.

Stick with the bidir mode then.