first of all I wanted to say how much I admire this project and hope that it will get the appreciation it deserves.
Right now I'm working on maps for a SNES style game and the one thing I'm missing is an "Color Addition" transparency effect for the layers to create some sort of illumination, additionally to the already built in "Color Averaging" transparency which I love btw.
Hopefully this can be added to the program in future updates. I would really appreciate that.
Keep up the great work!