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Carlosan

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  5. Ambient Occlusion when UVs overlap.

    in Questions & Answers

    Posted

    Source...

    OVERLAPPED RENDERING
    The first problem is straight forward: if a pixel of a texture is used twice by a polygon’s UV coordinates, your baking process will write to that pixel twice, overwriting previous information. This isn’t always a problem, but can result in weird facetted bakes that are completely unuseable. Since you should always strive to make the most out of your UV space, uniquely unwrapping the otherwise overlapping parts is not a solution for this.

    The baking process is clearly the only problem here.

    The solution is to offset your overlapping parts. You move one or more of the overlapping parts (so there’s only one polygon occupying the UV space) exactly 1 UV unit aside. This makes sure there is no more overwriting. Out of bounds texture coordinates are wrapped back during texture lookups, but not during rendering to texture, fixing our problem.

    image.jpegimage.jpeg

    NON-SYMMETRICAL AO SHARING
    Symmetrical objects can easily share AO texturespace, al you have to do is mirror their UV coordinates. Problems arise when the AO baked onto the texture, is not correct for each side. Imagine a car bumper, where each half shares the same texturespace. Now if there is some sort of detail in front of only one half of the bumper, you might end up with a black spot on the other half of your texture, even though there is no occluding geometry there.

    In such a simple case, it’s enough to only bake the half without occluding geometry and trade off some accuracy in your AO maps. More complex problems arise when you have object that are really different in terms of occlusion, use the same space. Depending on how wrong the bake is, you might even have to completely overpaint small parts of you baked AO. Just try to keep it really generic in terms of occlusion, just some simple shading that works for all geometry using the texturespace.

    image.jpeg

    another solution...

  7. I made my first UV map manually it's really ugly and I need help!

    in Questions & Answers

    Posted

    This is not the correct steps to transfer to Paint Room

    The steps are Sculpt room > Retopo room > bake > Paint room.

    Paint tweak and uv works over the same mesh type.

    Retopo and modeling room works over the same mesh type.

    Sculpt works over surface and voxel meshes.

    At this stage the best way for you is to export the model from uv room as obj or fbx, import into Retopo and the from there Bake for PPP to transfer the mesh with UVs to Paint room to texture it.

    Take a look to understand the process:

     

  9. [Solved] 3DCoat applink to blender

    in 3DCoat AppLinks

    Posted

    “3DCoat” is trying to create a user data folder (which contains user settings and assets) inside “C:\Users\USER_NAME\OneDrive\???????\3DCoat”.
    That is incorrect. It should create it inside “C:\Users\USER_NAME\Documents\3DCoat”.

    To workaround this problem:
    Start > start typing “Edit the system environment variables” > Environment Variables… > System variables > New… >
    Variable name: COAT_USER_PATH
    Variable value: C:\Users\USER_NAME\Documents\My3DCoatData (specify your user name inside)

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