Quote - How do you invert the transparency? I used cosine and it seemed to invert it but is there a better way? Also the transparency doesnt seem to get rid of the edge for me. I'll have to check in after this weekend ~ good luck :)

The transparency didn't get rid of the edge for me either. I built a node network to solve the problem. Now I can drop in any leaf on a white background and that's it. I don't even use a transparency map at all. I used nodes to detect the white part and mask it out. Will show tomorrow.

But as to the direct question, how to invert a transmap, it is 1 - x.

Math node set to subtract.

Value_1 = 1

Value_2 = 1 and plug in your map

The result will be an inverted copy (a negative).

You can do the same for color negatives, too. Use Color_Math instead of Math and white in the colors.

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