I am taking a graphics class and I have a problem I have not been able to resolve. When I translate along the Z axis objects are clipped before their size changes. It almost seems likes its stuck using a ortho prjojection some how. That being said the clip plan is very close and to me does not resemble the one I set in gluPerspective. It starts to clip after being translated -0.6 units down the z axis. Attached is the code that I use to setup the projection matrix. main = do (progname, _) ← getArgsAndInitialize --initialContextVersion 3 0 createWindow "Ben Christy Assignment 2" windowSize $= Size 800 600 matrixMode $= Projection loadIdentity depthFunc $= Just Less viewport $= (Position 0 0, Size 800 600) perspective 60 1.333 1 1200 --tableModel ← initModelVBO (vertexTupleListToVertexList table) changesRef ← newIORef Map.empty sceneRef ← newIORef buildSSG balloonState ← newIORef There balloonZTarget ← newIORef 4 balloonZStart ← newIORef 0 balloonStep ← newIORef 0 balloonNumSteps ← newIORef 0 reshapeCallback $= Just reshape displayCallback $= (displayScene sceneRef changesRef ) --addTimerCallback 10 (animate sceneRef changesRef balloonState balloonZTarget balloonZStart balloonStep balloonNumSteps) keyboardMouseCallback $= Just (handleInput sceneRef changesRef) mainLoop reshape (Size w h) = do print "resize" matrixMode $= Projection loadIdentity depthFunc $= Just Less viewport $= (Position 0 0, Size w h) perspective 60 1.333 0.01 1200 matrixMode $= Modelview 1 loadIdentity postRedisplay Nothing