On 2021-01-27 18:46:11 +0000, kurtz le pirate said:

> Hi,
> 
> 
> I try to have "transparent" background for one image. In accordance 
> with the documentation, i check the "Add Alpha Channel" in output 
> options. The file type is png. I had already used this option with the 
> previous versions without any problem. It even seems to me that in the 
> image window, a button could raise the transparency (the grey/white 
> checkerboard).
> 
> This feature seems no longer exist.
> Error on my part or forgotten option ?
> 
> 
> My config :
> Povray 3.8.0-alpha.10013324.unofficial
> Mac OS X 10.10.5 (14F2511) - Yosemite.
> 
> 
> Note : work with MacMegaPov v1.2.1 r3 (Universal)
> Display windows is empty, but pgn file is OK.
> 
> 
> 
> Regards

It is still there:
Turn on "Add Alpha Channel" in the "image & Quality" panel on the 
preferences panel.

And use this simple example scene:

camera {
	perspective
	location < 0.0, 0.0, -5>
	right x * 1
	up y * 3/4
	angle 60
	look_at < 0.0, 0.0, 0.0>
}
light_source {
	< 0.0, 100, 100>
	rgb <1.000000, 1.000000, 1.000000> * 1.0
}

sky_sphere {
	pigment {
		rgbt <0.016749, 0.198007, 0.999977, 1.000000>
	}
}
sphere {
	<0.0, 0.0, 0.0>, 0.5
				pigment {
				rgb <0.500000, 1.0, 1.0>
			}
	
}

--
Yvo

-- 
-------------------------------------------------------------------------------------------


POV-Ray 3.7 unofficial: http://megapov.inetart.net/povrayunofficial_mac/
UberPOV Mac: http://megapov.inetart.net/uberpov_mac/index.html#Mac
MegaPOV: http://megapov.inetart.net
E-mail: yvo(DOT)s(AT)gmx.net

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