I want to make a bunch of glowing units in my game (may have 20-30 of them on screen at the time) and I've got two ways to do it.
The first is straight forward, its just a sprite drawn to have a glow effect when animated.
The second is to create a copy of the sprite with lower opacity (eg. 60-70), and fade the original sprite on top of it in a loop.
Just wondering whether 20 animated sprites or 20 fade effects will take more processing power (it's a mobile game).