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motion blur?

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hi, i found a very cool morphing demo while browsing nehe''s site! the demo can be found here: http://homepage.ntlworld.com/fj.williams/PgSoftware.html the demo can be found a bit down the page, called opengl morph demo or something... can anyone explain how the motion blur effect is created, it looks so cool... that''s something i''d like to learn... thanks in advance!

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A fast trick to do motion blur in OpenGL is to draw a black, translucent texture on top of your scene (don''t clear the screen every time you draw the scene). This is the method I use and it has very little impact on framerate.


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