Not what I need for now. I would need larger sizes (GPU not an obstacle)  and on OSX. But I'll keep an eye on it. I have become a PixelFX addict and I could easily imagine becoming a JuiceFX one also.

For OSX try some of the tricks to run windows app on Mac, donwload the demo and if work  you have it. But no plans for mac sorry.

About larger sizes it should be possible in next versions.