Question by SpiralConDave · Mar 22, 2016 at 11:46 PM · texture optimization skybox cubemap

What is the best way to optimize cubemaps for skyboxes?

I have a mobile app with 10 levels, and each has a different skybox. The skybox is a cubemap derived from an equirectangular image. I set the max texture size to 2048, so I assume this will crunch whatever size the file is into a 2048x1024 image (am I wrong?) So 2 megs or so per image? About 20 megs total?

It's like well over 100 megs of APK when built. What are the best settings? or is there a better way? (It's a Cardboard panoramic viewer)

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Graphics_Dev · Mar 23, 2016 at 11:42 AM 0

Try the crunched compression format for large textures on mobile devices.

SpiralConDave Graphics_Dev · Mar 23, 2016 at 09:43 PM 0

Tried that, almost no improvement.

I thought that setting the import max size would mean, when the app is built, that only that much data would be saved to the apk. I resized the original files to 2048x1024, and it saved me a TON of space. So that's odd. Has that always been the way it was supposed to work?

Graphics_Dev SpiralConDave · Mar 23, 2016 at 10:19 PM 0

Yes, that's how it works :)

I don't know what you mean by 'almost no improvement'. If you change the compression quality you can get it VERY small ;)