I wonder how to render an alpha image to use for sculpting mode. This alpha image is called Height Map images.
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3$\begingroup$ I'm afraid I'm not quite sure what you want. Have you tried doing this? What exactly didn't work? $\endgroup$ – gandalf3♦ Feb 9 '16 at 19:00
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1$\begingroup$ Possible duplicate of: How can I get a Depth of field render pass? $\endgroup$ – Carlo Feb 10 '16 at 11:58
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$\begingroup$ Is the edit poor made consistent with what you're wanting? $\endgroup$ – TARDIS Maker Feb 10 '16 at 16:05
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$\begingroup$ I have added images in order to understand my question. $\endgroup$ – jagoji3d Feb 10 '16 at 16:55
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$\begingroup$ Okay, I thought those where images that poor added. Good to see that they're yous. $\endgroup$ – TARDIS Maker Feb 10 '16 at 17:31
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First Render out the image. The lights and materials don't matter.
In the compositor add a normalize node and drop the z pass through that. This will make the lowest value 0, and the highest 1 while mapping the rest through that.
Then with the RGB Curves node, switch the handles so that they are inverted (left being on the top, and right on the bottom), and add a handle in the middle and adjust it until you're happy with the result.
The finished node setup should look something like that
answered Feb 9 '16 at 19:39
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$\begingroup$ It looks like you are using an orthographic projection too right? $\endgroup$ – PGmath Feb 10 '16 at 18:28
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$\begingroup$ Yes, but it's not necessary, of course. $\endgroup$ – josh sanfelici Feb 10 '16 at 18:40
