What happens when we use ETC2 on Open GL ES 2.0 devices

News & General Discussion
1

Hi,

We want to know what is a fallback for ETC2 on Open GS 2.0 devices? We use ETC2 texture format and in player setting we use “force open gl es 2.0”.

Our game still works on devices with both open gl es 2.0 and 3.0. What does unity do if we use a texture with ETC2 on a device where its not supported?

I searched on net but didn’t find any answer to this question.

2

Generally, unity decompresses texture on the CPU if device’s GPU doesn’t support its format.

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3

Tautvydas, thanks for your quick reply. This does answer why our game still works.

We are using “force open gl es 2.0” in player setting for android. Does it mean even on devices where open gl es 3.0 is supported it will still decompresses texture?

“Decompresses texture” means it will be using RGBA 32 bit or there is a default compression which unity uses if GPU doesnt support its format.

4

It means it’s gonna use RGBA32. Even if the device supports GLES3, but you force GLES2, it will still decompress it on the CPU.

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