[Blog] Volumes of time burnt!
- 32 Samples on render at 25% 1080pHD
- 128 Shadow and Volumetric samples
- 8 M clipped to 4 layer chunks
- Mask blur is only around 5 pixels, so you can see the layers.
Conclusion: You need even distributed samples. Round 2? You also need like a 50% overlap to blend better I think.