In any case, I’ve submitted a fresh bug report for the render targets. I also uploaded a video demonstrating the issue.
https://www.youtube.com/watch?v=jQZQ…ature=youtu.be
One thing that is different between now and the other preview builds is that the ES3.1 preview actually shows the problem correctly. Previously it would appear to work in the preview but not the headset. So uhhhh, good job on that? 