Masking

[BenSCR]

I've masked a Nike Trainer with no problem. But when I change the angle of the trainer, and have it on a black (with shows more clearly) or any other lighter colour. I get a faint white line the same szie of the photo I originally Masked the Trainer from.

What is it I've done incorectly?

[Chuck Uebele · Accepted solution]

You just need to fill in the mask more with black to get rid of the line.

[c.pfaffenbichler]

You rotated the Layer without converting it to a Smart Object before? 

That will probably not alleviate the problem completely but it seems unconscionable to me. 

Edit: Ah, I had misunderstood and thought it was about the shoe’s edge … the rectangular edge should actually be taken care of by converting to a SO before applying any transformation. 

You may have to decontaminate the edge pixels. 

[josephlavine]

You can simply paint with black on the edge of the mask where you see the white line.

warmly/j

[c.pfaffenbichler]

The issue seems typical for people creating a Layer Mask that Reveals All and fill it with black instead of inverting it.