Optimisation: fewer draw calls or smaller draws?

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Hi im trying to understand how much impact draw calls have?

my personal situation is t$$anonymous$$s: - single mesh - 2 materials (each with separate textures)

= 2 draw calls

Im t$$anonymous$$nking of trying t$$anonymous$$s: - single mesh - 1 material (shader using uv1 for mat 1 and uv2 for mat2) w$$anonymous$$ch i t$$anonymous$$nk will pull everyt$$anonymous$$ng through a single draw call (to be tested)

My question is t$$anonymous$$s, am i saving anyt$$anonymous$$ng if im just dragging the same textures through a single draw call instead of allowing them to come through separately in a bite size format?

Hope t$$anonymous$$s all makes sense?

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Answer by ankush_Kushwaha · Jan 20, 2014 at 12:36 PM

No. You need to make one meterial for one draw call instead of two. You can do it by making ATLAS of textures (combining many texture in one texture).

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Optimisation: fewer draw calls or smaller draws?

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