I just want to revive this as it's still bugging me, I just can't seem to be able to get a clean mask that doesn't result in halos/black edges around the selection.
I normally render to a noise percentage.
I've got a 5000px render that I set to 3% noise.
I now need a mask for one of the objects.
If I open the file, and add those objects to a monochromatic CMasking_Mask element, tick render only masks, and hit render, it gives me a mask but it's not correct. Mainly because I don't know when to stop the render?
During the main render I can see the noise percentage reducing in the stats tab, but when I'm just rendering a mask, it just says Unknown?
If i zoom in to the point where I can see the antialiasing, i can see the white mask constantly refining which means I'll never know when it matches the render for a perfect mask.
I feel like I've gone back to 2010 when it comes to masking :(
I appreciate it would be perfect has I set it up with the render, but that's not always the case.