ASTC Compression NOT compressing "HDR Compressed" or "HDR" type textures
I'm trying to use HDR textures in my mobile game and I'm using OpenGL ES 3.1 and ASTC. However, I've noticed that when cooking Unreal does not compress HDR textures, at all. Even though one of the cool features of ASTC is its ability to compress HDR textures. I've used Mali Texture Compression Tool to do some tests and with the 8x8 blocks a 2048x2048 is reduced form 48MB to about 2MB. The reason why I believe it is not compressing them is because I've done a build with HDR textures and without them, and the delta between the two is exactly the size of an uncompressed HDR texture, which is huge!
Could anyone shed some light on this? Is it a bug or perhaps the cooker has only the super basics implemented for ASTC and HDR textures are simply being ignored and cooked as uncompressed?
asked Mar 13 '17 at 05:42 PM in Packaging & Deployment
Thank you for submitting this post. I have reproduced this issue and logged a report for it here: https://issues.unrealengine.com/issue/UE-42939
You can track the report's status as the issue is reviewed by our development staff. Please be aware that this issue may not be prioritized or fixed soon.
answered Mar 15 '17 at 05:14 PM
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