Tutorial : *--How to Remove and Add Background-- ( STEP BY STEP GUIDE )*
I decided to do this tutorial for anyone who needs help with removing backgrounds and isn't sure how to do it. It's a step by step guide to how to make your background transparent for editing purpose...
I tried this and even though I turned the threshold down to zero, I still got a tiny white line around my sim. I just always use the paths tool, path to selection, invert selection, add alpha, and clear the background.