Will PDF3D accept true 3D volumetric models?

Will PDF3D accept true 3D volumetric models?

No, VOXEL models, or 3D space-filling grids are not supported. The input model should be composed of geometric primitives such as triangles, points, lines, quadrilaterals, NxM 2D grids, etc. Similarly, 3D volume elements such as tetrahedral or hexahedra are not supported, only surfaces. PDF3D supports models containing triangle meshes, lines and points, arrows, cubes, spheres, cylinders, cones, 3D labels, elevation grids, etc. See technical documentation and sample gallery for more details.