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The question is two fold:

  1. What happens on a device when a texture is too large for it to handle? Will it crash or simply downsize it?

  2. In Unity if I use texture atlases of size 4k and then set Texture Quality in the Quality settings as half res will it run normally on devices with maximum texture size of 2k?

Esa
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1 Answers1

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According to this thread automatic downsizing may not work, but setting half res should work.

On a related note, do you really need textures that big? If all you want from a big texture is to use it as an atlas there is really very little reason to not just use 4 2k textures instead of one 4k.

And I assume that this is about writing games for phones, for PC graphics anything that doesn't support 4k textures is really ancient.

aaaaaaaaaaaa
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  • The thing with 4k atlases is that you can fit more objects into a single draw call when batching. And yes, mobile devices are the target. – Esa Aug 12 '13 at 08:57
  • @Esa If you end up with 4 draw calls instead of 1 I wouldn't think it's a big performance impact. You better avoid hundreds or thousands of draw calls, but most likely this isn't going to be much of a dent in your performance. – aaaaaaaaaaaa Aug 12 '13 at 09:36