Hi. I'm having the problem understanding the multipass rendering of the simple water effect as seen in here: https://github.com/xarray/osgRecipes/blob/master/cookbook/chapter6/ch06_08/simple_water.cpp The example contains: * scene (airplane); * RTT camera (renders reversed scene to texture); * water plane (uses the texture of the reversed scene).
I don't understand why the final osg::Group that is added to osgViewer::Viewer has all three nodes added: * scene; * RTT camera; * water plane. Can anybody explain why RTT camera should be added to Viewer? It's only used to generate texture for water plane, so why add it? Thanks.
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