no result on displacement map

whenever I bake the displacement map it bakes all grey, I have tried multiple times and my base mesh compared to any level is not majorly different like in the other comments under here. any ideas please? 


https://www.dropbox.com/s/oywo9ipy36ewik7/realistichuman.blend?dl=0

  • Norb Fry(coolermint) replied

    spikeyxxx and everyone else that joined, thanks for all your inputs.

    3.3.2 doesn't work for me at all, i have applied shape keys and multires as well as rebuilt it with the exact same result; none.

    i have now tried multires on a sphere, adding all types of wrinkles, bumps, creases etc. in 3.4.1 and it all baked perfectly on all resolutions too.

    althought it makes no logical sense, i have now agreed with myself that this mesh is only causing issues, and most likely will remain problematic even if the 3.3.2 worked for me.

    i am about to finish the course, and i have learned a lot. this mesh will remain as the course head that has never gone further than that and that's fine, i will jump onto another one with the knowledge i have now.

    it is too time consuming to continue finding a solution for this, spending an hour on smoothing verts is not a solution at all. also the 3.3.2 displacement maps look really bad compared to any other / my newly baked ones.

    it is a shame that nobody knows the issue or solution however, and it is really hard to believe that this is a bug since all other items work. it's even more annoying to me as i wouldn't call myself a beginner either! 

    i will keep on checking this thread from time to time as they say 'hope dies last'

    x

  • Norb Fry(coolermint) replied

    what i meant regarding the 3.3.2 displacements is that they don't look like carrying data over rather just distribute really black areas in comparison to the one below I baked in 3.4.1 on Kent's fileScreenshot (7).png

  • Kent Trammell replied

    Sorry I'm catching up late to this conversation. I've spent the past hour troubleshooting these issues. First I can confirm what you both are experiencing with regards to odd bakes (dark spots that are obviously wrong) and plain gray bakes at resolutions above 1024x1024.

    First, I think I can offer a solution to the odd baking. I kept getting a large black spot on the shoulder, no explanation why. Face normals were fine, no visible issue with the mesh itself. But a reliable method I use for "resetting a mesh" that's acting funny: Export as .OBJ and then import. Exporting as a new mesh format and bringing it back into the scene serves to reset or refresh the mesh in my experience. Here's how to do it:

    1. Select your object and set multires viewport level to highest (max detail).
    2. File > Export > Wavefront (.obj) and check "selection only" in the include section, make sure "apply modifiers" and "include UVs" are checked in the geometry section.
    3. Export your model (this will take several minutes for million-poly meshes; 2 GB file in your model's case)
    4. Import your model (this will also take several minutes; blender will appear to be frozen). You can import into a fresh blender scene (for baking maps only) or into the same scene you exported from.
    5. Once import finishes, add a multires modifier and rebuild subdivisions (this will also take several minutes).
    6. Now you're ready to setup baking again. Bakes were much better for me after export/import.


    HOWEVER I cannot get your model to bake at 4K resolution and I have no idea why. It bakes great at 1024x1024 but nothing above that (not even 1050x1050). I've tried in Blende 3.4, 3.3 and even 2.93. I've never seen this before and I'm baffled...hard not to think it's a glitch of some kind...

    2 loves
  • Scott Cambell(scottimusprime95) replied

    I can confirm after much suffering that Kent's solution works, just be patient with the waiting times.

    A mistake I made was adding subdivisions to the new multires instead of "Rebuild Subdivisions".  Just an FYI for anyone who has blonde moments.

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