Hi SUMA gurus,

I'm wondering if there's a way to lower the opacity of a foreground plane relative to the background convexity plane in SUMA. In brief, what I'd like to do is have a foreground plane covering the entire brain that is relatively low opacity (e.g., 0.4 relative to the background convexity) to give some sense of the below threshold activation map, then have the nodes that exceed a threshold displayed at full opacity (1.0). This is very similar to the feature request in AFNI here.

My original thought was that I could do it with if I had two redundant foreground planes. One would be relatively transparent compared to background, then I would stack one on top that was thresholded and displayed at full opacity. However, after fiddling with the stack and opacity, this doesn't really seem feasible, since opacity in a foreground plane only affects mixing with the other foreground plane, not with the background. Please let me know if this can be done with the current mixing/opacity technology and I just haven't picked up on it yet! Or perhaps there's something in the .sumarc? Otherwise, I suppose this is a feature request.

Thanks for the help!
Sam



Edited 1 time(s). Last edit at 12/21/2014 09:55PM by Sam Nastase.