It will be at a random point. No particular angle.

The red circle is not supposed to be moving along the edges or along any path. It will simply sit there or on any other side (right/left/top/bottom etc.).

I may have overcomplicated things here. Auto-trace is not an option.

I want the center of the red circle to be placed at the edge of the black shape. I believe this can be achieved by ‘sampleImage’ to determine the luminosity of the black layer and applying to the position of red circle. Hope this makes sense.

Hello there,

Firstly, I’m not an expressions specialist (like most of you).

I have one opaque object (black layer as shown in the image) and would like another object (red circle) to be centered at the edge of the black layer where it goes transparent. The attached image is only for reference. I want it to be done automated and not manually. If this…

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