Hi Robert, A warning from visual studio 2015 points at an actual (minor) bug: Renderer.cpp(231):const GLuint64 hiMask = 1 << hiShift; Renderer.cpp(235):const GLuint64 wrapAdd = 1 << tbits; // <- this will fail if tbits is 32, because "1" is an __int32
every ~4.3 seconds a 32 bit gpu timestamp will procuce invalid statistics. Aparently you had a driver/hardware combo in 2010 with a 32 bit timer query, not sure if that still exists. Bug and bugfix tested with both VS2013 and gcc , but I am not sure about the portability of the LL suffix. a cast to GLuint64 would work too. attached Renderer.zip contains a bugfix ( 1LL instead of 1 ) modified file: OpenSceneGraph\src\osgViewer\Renderer.cpp this file is only for the current git head. (file has other changes after 3.4 branch). OpenSceneGraph\src\osgViewer\Renderer.cpp(231): warning C4334: '<<': result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?) OpenSceneGraph\src\osgViewer\Renderer.cpp(235): warning C4334: '<<': result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?)
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