Blackmagic Forum

In Fusion, I see that I can either blur (node Blur) or erode (node erode/dilate). I need to blur only those eroded edges, so the blur doesn't affect the rest. In Nuke I would use the "Erode (blur)" node, how can I achieve the same effect in Fusion. I don't mind combining several nodes.

When it comes to Fusion I would recommend watching anything by Simon Ubsdell. His knowledge is deep.
Somewhere in this five parter is a way to do exactly what you’re asking. Isolating and edge and blurring it. It also may be under a tutorial of his, on making your own Keyer controls.
Best of luck.



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Are you talking about blurring the RGB channels, Alpha or both?

Try using the matte control node after the erode/dilate node. You can then blur and contract/expand the alpha only. Depending on what you are trying to achieve this may work better and negate the need for an erode node.