Hi Tristan,

The error that the OSG is emitting couldn't be more direct - the
extension required to support ALPHA_MAX isn't support by your OpenGL
driver.

Do a glxinfo to see what is supported.  If what you want to do isn't
support then you'll need to go off and find another route to doing
what you want to do.

Robert.

On 3/16/07, Tristan McMillan <[EMAIL PROTECTED]> wrote:
Hi OSG Community

I am trying to use osgblendequation example. However for ALHPH_MAX/MIN I
get the following errors:

"Equation name = osg::BlendEquation::ALPHA_MAX


Warning: BlendEquation::apply(..) failed, SGIX_blend_alpha_minmax
extension is not supported by OpenGL driver.

Equation name = osg::BlendEquation::ALPHA_MIN

Warning: BlendEquation::apply(..) failed, SGIX_blend_alpha_minmax
extension is not supported by OpenGL driver."

Does anyone know how to solve this?

I have loaded the latest Nvidia driver for Fedora core 4 but that has
still not helped.

And I haven't found anything like this in the forums yet.

Thanks
Tristan



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