Is this new? I thought ETC2 didn’t support RGBA? (alpha)
Or is it something new for ES3 only?
It is OpenGL ES 3.0 in Unity AFAIK, and it is mandatory to support ETC2 formats with devices that provide OpenGL ES 3.0 support. (OpenGL 4.3 also has mandatory support for it, but AFAIK Unity doesn’t have OpenGL 4.3 support)
Ericsson Texture Compression (ETC) is a lossy texture compression technique developed in collaboration with Ericsson Research in early 2005. It was originally developed under the name iPACKMAN and based on an earlier compression scheme called iPACKMAN.
The original 'ETC1' compression scheme provides 6x compression of 24-bit RGB data. It does not support the compression of images with Alpha components, although there are work-arounds for this.
ETC1 takes 4x4 groups of pixel data and compresses ...
Darn, I was hoping somehow I missed that I could use alpha in ETC2 compression with OpenGL ES2
