Hello, I did a dispersal effect with butterflies and it worked (lucky guess).
I wanted to do the same with triangular figures made by myself, then exported on PNG files before being integrated as a picture brush.
This time it doesn't work like with butterflies : I have a transparent square around my brush that prevents me from making the dispersion effect on the white mask (no problem for the black mask).
I notice when I compare the butterfly's brush and the triangles' one a difference in "brush tip", the image is not displayed in the same way, yet I don't know how I did the first time to get my butterfly brush correctly.
Do you know how to correctly set up the "brush tip" to make the transparency square of the brush disappear ?
Pictures :
Menu with the brush tip that causes the square of transparency :
"Brush tip" image of the butterfly (without the transparency square).
A test image to show you the difference between the butterfly brush and the triangle brush when I do the dispersion effect on two squares of different colours :
