Hi Robert, thanks for your reply.
Robert Osfield wrote:
It sounds like osg::Scissor (wraps glScissor) would be what you need.
Isn't osg::Scissor doing just a 2D clipping in window coordinates? What I need is a 3D clipping of all sides of the former view frustum. Especially when looking in through a "side wall" of the scaled-down frustum, scissoring would not work.
The way I understand it, my results for Scissor and the ClipNode approach would only be identical, if I used an orthographic projection. But I am using a perspective projection, making it possible to look into the scaled-down frustum volume from more sides than just the former view plane.
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