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Smooth shadows on 9700

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Using shadow buffer on 9700 works fine but gives hard shadows. I tried to adapt some NV demoes that do a filtering kernel for the 9700 but the fs is too limited so it runs in software. When I reduced the number of sampling, it runs in hw but everything is black. I noticed my other shaders were messed up as if things are getting corrupted. I reduced the number of samples down to 12 or so and this is ok. So I decided on multipass..... and that leads to other complications. I got it working but maybe my shaders have errors so parts that should not be in shadow are sort of shaded. It runs slow but that is ok. It is "interactive". Has anyone attempted smooth shadow buffer on 9700? Is it possible to even do VSM? I have never done VSM and I am about to study it.

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