Hi Folks, I know I asked this a few months ago, but I still haven't found the source of the problem.
I am generating a database using OSGDEM. The imagery has four components (Red, Green, Blue, Alpha) but the RGB components are black wherever the alpha is < 1.0. What would cause this? Using a shader to select just the RGB components I get black where the alpha component is < 1.0. Does the fixed function blending have an effect on this? Or does OSGDEM perform some image translation that could be "applying" the alpha during database generation? For reference I've attached my source image and database. The following command was used to generate the database: osgdem --RGBA -t TestPatch.tif -o TestPatch.ive -B --- Renaissance Sciences Corporation O/M: 480 290-3997 F: 425 675-8044
TestPatch.ive
Description: TestPatch.ive
TestPatch.tif
Description: TestPatch.tif
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