Hi!

I'm trying to flatten simple uv shapes but I get some streching and I curently don't have access to the labs/games tools.

Try creating seams based on edge angle, then UV flatten with those, then UV Layout the result with scaling according to size (some check there dont remember exactly the phrasing).

I'm already using an edge selection to decide of the UV seams. You can't see it in my image but i'm doing it on a flatten higher up the chain.

I ended up moving a few points here and there and BAM! the flatten worked perfectly. It's so unpredictable!!

-Olivier