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dunno if using a 32 bit floating point texture for the depth map could be the solution, since i cant get it to work.. BMAP* depthMap = "#800x600x14"; is always plain white

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out_color.r = clamp(depth    , 0, 255);
out_color.g = clamp(depth-256, 0, 255);
out_color.b = clamp(depth-512, 0, 255);
out_color.a = clamp(depth-768, 0, 255);

out_color.r = clamp(depth         , 0, 255); //   0  -  255
out_color.g = clamp((depth-256)/2 , 0, 255); // 255  -  768
out_color.b = clamp((depth-768)/4 , 0, 255); // 769  - 1792
out_color.a = clamp((depth-3840)/8, 0, 255); // 1793 - 3840

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ello: The trick is to render to depthmap to the alpha channel and not the rgb channel. The alpha channel is 24Bit whereas the rgb channels are 8 bit each. You might want to have a look at this paper:
http://ati.amd.com/developer/gdc/Scheuermann_DepthOfField.pdf />

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dunno if using a 32 bit floating point texture for the depth map could be the solution, since i cant get it to work.. BMAP* depthMap = "#800x600x14"; is always plain white

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Trick seems to be to render to the alpha channels instead of rgb channels... it's 8bit per color channel vs. 24Bit alpha channel apparently:

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ello: The trick is to render to depthmap to the alpha channel and not the rgb channel. The alpha channel is 24Bit whereas the rgb channels are 8 bit each. You might want to have a look at this paper:
http://ati.amd.com/developer/gdc/Scheuermann_DepthOfField.pdf
/>



Cheers

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