Hi,
i have problems to get the shield working with OpenGL ES31. I tried it with 4.7.5 and with the 4.8 master branch. The results differ visually but here is an example of the default twin stick shooter template:
As you can see the screen is flickering and colors are wrong. The example was packaged with 4.7.5. I unchecked OpengGL ES2 and checked OpenGL ES31.Here are the files from the 4.8 Android ASTC package (Version: 4.8.0-0+UE4):
https://drive.google.com/folderview?id=0B0Vb6Te72gt7THE1RHYwNzR3X2M&usp=sharing