[osg-users] VPB/osgdem and transparent textures

Robert Osfield robert.osfield at gmail.com
Tue Jul 1 12:57:23 PDT 2008


Hi Mike,

What makes you think that the alpha is being ignored?  Have you
enabled GL_BLEND in your app?

Robert.

On Tue, Jul 1, 2008 at 8:39 PM, Mike Lewis <jhg886 at gmail.com> wrote:
> Hello,
>
> I'm using OSG 2.4 and VPB 0.9.8 and I'm having an issue. I'm handing
> osgdem raster texture files with transparency but the resulting
> terrain models seem to ignore the alpha channels entirely. Also, I
> thought VPB alpha'd out NODATA regions. For some reason, it seems to
> be coloring them solid black instead, for me. Does VPB support having
> transparency in the texture imagery? I've tried various PNG and
> GeoTIFF images and seem to come upon the same result. I've tried the
> various --RGBA and --default-color command line options to no avail.
> Am I missing something?
>
> Thanks
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