background plate renders with solid alpha?

[ngrava]

@Neilg

by setting in color mapping gamma to 2.2 and pressing sRgb in buffer you are double gamma correcting. What you need to do is check in color mapping - don’t affect color - adaptation only.

What I said before about affect all channels didn’t work for the alpha?

Well, that’s not really the issue I’m having. The Background (ImagePlane) is rendering solid in the alpha as if it was an object in it’s own right. This should not be the case. So, even if I get the refractive objects to render in the alpha, the alpha channel is all white due to the Image plane blocking it all out.