Frame Buffer Operations. Obscure Tricks and Cool Visual Effects. Operations on Fragments. Depth Test Blending Scissor Test Alpha Test Stencil Test Dithering Logical Operations. Scissor Test. glEnable(GL_SCISSOR_TEST) glScissor ( x, y, width, height)
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and Cool Visual Effects
Create a texture
of wavy lines?
Isn't this just
the scissor test?
Motion Blur - leave an image trail
Depth of Field - make distant objects a little blury