GPU LUT + Photoshop

Hi @hubris,
That's strange!. As far as I remember @patricio made the ofxFx lut based on the lut example, which I made. I haven't checked its maths but it should behave in the same way. The segmentation thing might be due to the bitdepth of the rendering surface. I'll try to check what's going on inside ofxFX and let you know.
best