Thank you guys for the helpful comments - I am finally circling back to this as it was not the highest priority bug at the time.
I'm really hopeful these tips can help me get it sorted :-)
I'll tell Iain you have said hello!
foriero a écritThings to double check. See if you haven't keyed color as the first or last frame.
I don't understand this one - can you elaborate?
Jamez0r a écritJust my 2 cents, and you may have already looked into this (I think it was mentioned in that other thread about coloring), but the first thing I usually check when something works on one computer but not another is the Script Execution Order.
I actually believe this is a contender for what's going on but it will be difficult to find and diagnose since i can't repeat the error myself. I hope to find a computer with the bug but i currently don't have one. its 1/20 people that actually have this. Gamer PC's usually and both my fastest ones don't do it.
Here's a list of the machines w the problem so far trying to find patterns.
Confirmed now - that in a scene, totally devoid of objects except color buttons and a Spine character, the SetColor works fine. So basically Spine is working fine but something in our main gameplay scene is causing it to malfunction for certain people (seemingly with fast computers)
So i think there's some execution order thing going on indeed. It's still stuck but I thought I'd clear Spine of the issue at least because its definitely specific to our game scene somehow.