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PixelPants

OpenGL My alpha-blended textures look odd...

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On the left is a PNG as it appears in GIMP, on the right is that image loaded into my 2D OpenGL application. As you can see, transparency is working, but the blending seems a bit off; the edges of the image are quite unpleasant.


[img]http://img30.imageshack.us/img30/1780/offop.png[/img]

I'm using:

glEnable (GL_BLEND); glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

with AlphaTest enabled and DepthTest disabled.

I don't think this is a "premultiplied alpha", so... could it be that I need DepthTesting enabled and to (very) slightly increment the Z value of each of the 2D draws?

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