I'm trying to model a physically based version of the Utah teapot. The teapot has fluid inside it, which is modeled as a closed manifold:


I'm trying to add a meniscus to the liquid. I have also modeled these as closed manifolds:


I apply two boolean union operators to join the three together and make a single manifold surface. However, the result still has geometry inside:


Here is my file. The fluid (layer 2, active) is unioned with the meniscuses (layer 10+2). Note: there is an intersection operator also, which is irrelevant (I can flatten it and the checks below are still true).

I have tried:

  • Cleaning any dead geometry and searching for any non-manifold geometry in all three objects (none, so manifold).
  • Recalculating the normals of the meniscus and fluid.
  • Inspecting the normals of the meniscus and fluid and confirming they make sense. As many other questions of this ilk had this as a problem, I checked it thoroughly.
  • Setting smooth or flat shading.
  • Only doing one meniscus.
  • Triangulating everything first.
  • Moving the meniscus up/down to see if it's a precision problem.
  • 1
    $\begingroup$ This is really not the proper way to work with meshes, Blender is not a CAD software. If you wish future success with mesh based modeling you should drop the Booleans, use adequate modelling techniques and proper topology $\endgroup$ – Duarte Farrajota Ramos Dec 8 '17 at 1:34

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