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How do I convert the Blender texturing techniques discussed in the link below into geometry so that I can print them on a 3D printer, and are there any limitations that I should be aware of?

How to add roughness to a surface using modifiers?

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If you apply the texture to a "displace" modifier, you can apply this modifier and have it affect your geometry permanently and 3D-printable. (The "displacement" from the material editor will not work for this, the texture needs to be used by the "displace" modifier.)

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There are only two things you should be aware of:

  • if you have any other modifiers (such as subdivision), you need to apply them before you apply the displace
  • obviously, the effect of your displace-modifier should be strong enough to be actually resolvable by your 3D printer
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