SSAOeffect.fx from the Screen Space Ambient Occlusion XNA 3.1 example doesn't work in XNA 4.0?

XNA 4.0 enforces the 512 instruction limit (which the xbox360 has and the HiDef profile enforces as a minumum), whereas XNA3.1 didn't.

If you are looking for an XNA 4 SSAO that has open source, check this link out : Deferred Rendering with SSAO Normals.

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