My existing particle systems seem to run very slowly on iOS. What should I do?
A: iOS has relatively low fillrate. If your particles cover a rather large portion of the screen with multiple layers, it will kill iOS performance even with the simplest shader. We suggest baking your particle effects into a series of textures off-line. Then, at run-time, you can use 1-2 particles to display them via animated textures. You can get fairly decent looking effects with a minimum amount of overdraw this way.
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