Twilight Render User Forum

If you need more reflections or if you notice that your transparent png files render black, it could be that you need to increase tracing depth in your render setting.
Twilight Render V2 allows you to edit render settings.
Changing the Tracing Depth value from 5 to 10 should fix the problem. The greater the tracing depth, it will increase render times. It could potentially fill your RAM with the photon map. This is not recommended in scenes with hundreds or thousands of instances... but could work on 64bit systems with large amount of available RAM.

Thanks for tip.