Hello,
I'm trying to learn how the POV exporter for blender 2.5 is working, and tring
to "improve". I started by focusing at having the right background color and
alpha.
In my export I use blender World.horizon_color as color for povray background
{<x,x,x>}. Correct me if I'm wrong but I believe it's possible to have this
"background" coincide with the alpha layer in povray's output just like Blender
does.

During my tests I managed to make it use beta 35a but something seems to have
changed in the way PNG output files alpha and colours are handled
It could be related to this:

Change 4886 on 2009/09/09 by clipka@cli-pc-xp64

  Fix FS#55 "Output_Alpha=on doesn't work as documented"

I can't say if the change is for better or worse but anyway I sill can't make it
behave how I'd want to:

-how it was in 3.62:
The Alpha channel used to be applied but colours under it were not retrievable

-How it now is in beta 35a:
The colours of the image are preserved, but the alpha channel is no longer
reachable by blender's image buffer.

-What I'd like to achieve: Just the same behaviour as Blender native renderer,
in which the background has a colour, but still shows an alpha transparency
channel when we toggle its display.

Can someone see where I'm mistaken or if one of the two softwares should be
changed?

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