1. Import the bound champion .skn and .skl you want to T/A-pose.
2. Find a skin that is in T/A pose and uses the same animations as the skin you want to pose (aka no legendary+ skin, just a more recent skin of the same champion). Don’t open it in the same Maya scene.
3. Import that skin’s SKL to the scene with the champion you want to T/A-pose.
