Blackmagic Forum

I am doing my composite on the color page. I have a static scene with an empty chair in the shot. I have a box shot from a different scene that I want to cut out and place the box on the chair to make it look realistic.

The mask cutout is done with the pen tool in power windows. The top edge of the box has a slight downhill angle and that angle is badly aliased.

Blurring or unsharpening or softening the mask does nothing with the aliasing problem.

I have the lighting and framing composition looking good. What's holding me back is the bad aliasing on the power window. Am I missing something?

Erik

Maybe try doing this in Fusion with a Polygon mask?

IsraEliteMedia wrote:I am doing my composite on the color page. I have a static scene with an empty chair in the shot. I have a box shot from a different scene that I want to cut out and place the box on the chair to make it look realistic.

The mask cutout is done with the pen tool in power windows. The top edge of the box has a slight downhill angle and that angle is badly aliased.

Blurring or unsharpening or softening the mask does nothing with the aliasing problem.

I'm puzzled by your description. On the one hand you mention that the mask has aliasing, but then you say blurring the mask doesn't fix this, which is weird. That makes it sound like the edge of the box itself is aliased rather than the mask. Could you do a screen capture of the effect?

I can confirm that the aliasing is NOT from the original image. My workaround was to move the mask edges just barely beyond the edge of the box cutout image. It's only when I cut ever so slightly into the white box that the bad aliasing begins.

Seems to be related to contrast somehow or just that you can see it with stark contrast. Since I was able to solve the problem for my needs I haven't worked with this any further yet.

Erik