Legacy Documentation: Version 2018.1 (Go to current version)
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ETC1 texture compression (or ETC2 for textures with alpha). ETC1 is supported by all devices. ETC2 is available on devices which support OpenGL ES 3.0; on OpenGL ES 2 devices the texture is decompressed on CPU.

See Also: EditorUserBuildSettings.mobileTextureSubtarget.

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