Re: Multiple Value2dDisplay's on a single Raster

[Nelson Minar]

>whatever gets written second over-writes *all* of the Raster, ie., the
>zero values are not transparent so that in effect only the second to
>be written values are seen in the Raster.

Can you just subclass Value2dDisplay and override the offending
method? I think it'd be pretty simple to do.

One gotcha - if 0 is transparent, then you need some way to erase the
Raster first before everything else is drawn.

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