> Is it possible to set the background image .. something that will:
> a) Show through in alpha mode
> b) Give some data to the rest of an image when the start/end row/column 
> are set

	Both are possible using the X Window display of povray-3.6.x for Unix
(see the doc/README.unix file in both PC-Linux and source distributions).
Note however that the background image won't be output to file.  For small
enough image size, this can be worked around by doing a screen capture.

	- NC

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