Sorry, but I don't know. I guess you will have to combine the result of
two operations.

Best,
Scuri

> But how could I set values (to erase) to a specific (not rectangular)
region?
> It would be like canvas:Clear() but with clipping.
> 
> victor
> 
> ----- Original Message -----
> From: "Antonio Scuri" <[email protected]>
> To: "'IUP discussion list.'" <[email protected]>
> Sent: Thursday, January 16, 2014 2:51 AM
> Subject: Re: [Iup-users] teselation sample
> 
> 
> >> The question would be: Can I fill with a transparent color to erase the
> > image?
> >
> >   No you can't. When using CD the color will be combined with the color
at
> > the image using the transparency.
> >
> >   You have to set the color values using IM, for example using
> > im.ProcessRenderConstant
> >
> > Best,
> > Scuri
> >
> >
> >
> >
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