On 6-8-2014 9:51, clipka wrote:
> The door image does have an alpha channel, but that channel is not used
> at all: Each and every pixel is fully opaque. There's nothing POV-Ray
> can do about that.

My conclusion too.

liujg: If you use GIMP, load your image there, go to Colours/Colour to 
Alpha... and set Black as your Alpha channel colour. Save your new image 
and try again.

I think you have defined an alpha channel but not the transparency colour.

Thomas

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