My best render, fixed the bug where pixels would occasionally turn to black

Same as the below image except with pathtracing only

I think the probabilities and multiplier values are correct now, 1024-2048 spp. Caustics look pretty good even without caustics maps

Pathtracing with MIS. Absorption for transmissive objects is not implemented. 512 spp

First attempt at MIS, there is definitely too much light coming from the indirect portion

Direct lighting only. The colors are pretty much identical to the opengl render so I think this is correct.

Path tracing, no MIS no next event estimation, max bounces 100, 512 spp, 16 sec render time