when optimizing one of our projects we noticed that one of our texture files had inflated a lot in size when looking at the file download size in the bowser inspector. Upon further inspection we found that this texture had been compressed using BASIS, but with the ASTC mode to reduce artifacts. In the playcanvas editor the reported file size after compression was 24 KB whereas the reported size in the inspector was 1.4 MB!
BASIS compression in ETC mode however, did not cause this unexpected file size inflation, so there seems to be something buggy with the ASTC mode.
The original picture was a 1024x1024 jpg picture with a size of 10 KB.
Anyone have any idea what’s happening here?