Michael Horvath Wrote:I think in earlier versions of POV-Ray things worked this way. However, in POV-Ray 3.7 a declared background overrides the Output_Alpha parameter.
Could be. I'm still on 3.6.
But, for me I need the POV-Ray "background" statement to still occur even when doing transparent renders (which is the only type of render I do these days). The colour selected by LDView to be used in the background statement (which you can also override from the top-include) controls the colour reflected by reflective parts. It's often useful to use a hint of light blue to simulate sky reflection in windows and windscreens, especially if the intention is to later add a real sky background image to the transparent png render.
I would have thought there would be a way in 3.7 to still specify the background (for the above purpose) but still get a 32-bit png with alpha. But since I haven't used 3.7 I can't help you...