About this project
One model assembled from geometry produced by several different kernels: mesh booleans, signed-distance booleans with blending, an SDF lattice field and a NURBS sheet, all resolved into a single solid. There are no exposed parameters. The scene is meant to be looked at and taken apart in the tree rather than adjusted, and the node names say which operation each one is.
What is in the tree
The root is a difference. On one side a union gathers a NURBS sheet together with the main body; on the other a cylinder 16 mm long, lying on its side and built from only eight segments, is subtracted, so it leaves a visibly faceted bore straight through the box.
The main body is a union of a 10 mm box with a sphere of radius 5 intersected against a gyroid pattern. That intersection is where the lattice comes from: the pattern block is 10 by 12 by 12 mm at a sheet thickness of 0.5, and the sphere trims it to a ball of lattice.
Which kernel does what
Most of the booleans run the default mesh path. The one that joins the box to the lattice ball runs in SDF mode on the adaptive engine, with GPU evaluation forced off and a smoothing radius of 3, so that junction is blended instead of meeting at a sharp seam. Comparing it against the sharp edges elsewhere in the model is the clearest thing to look for.
The NURBS sheet is a 10 by 14 surface, 1 mm thick, over a four by four grid of control points. It is there to show a spline surface taking part in the same boolean tree as everything else.
The cut plane
The root node carries a cut-plane post-process through the origin, so the model is displayed sectioned. That is what makes the lattice interior and the bore visible at all. It acts on the finished result and is not another boolean in the tree.