[osg-users] How is this foliage artifact called and how to fix it?

[Chris Hanson]

I believe your texture filtering mode is generating intermediate alpha
values, which then blend a portion of the distant background in before the
other "face" of the tree is drawn behind.

Switching to GL_NEAREST will probably avert this, but will look ugly in
other ways.
​
Alpha to coverage might help you here: http://www.humus.name/?page=3D&ID=61
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