Hi, if i have simple geometry in Image Editor, Square for example what setting is better for performance
Square drawed with Alpha 255 but with opacity 50 or drawed with Alpha 127 but with opacity 100 ?
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Doesn't matter. It's only when an object is doing something, moving, rotating, flashing, etc that matters, and even then it's usually a minimal cost, per instance.
Yes when transparent object is not moving colors are not mixed, but when is moving? what is better?
It's the same.
The only thing that would be better would be transparent, since then it's not even drawn.
Opacity 100 otherwise it will use a secondary texture and make rendering less efficient