No sketch open.

Draw a centreline as construction geometry, click it in the sketch, then use it. A datum axis works too, if it lies in the plane of the sketch.

Edges too tight for the radius are left sharp and counted in the tree — the rest are still rounded.

Edges too tight for the distance are left sharp and counted in the tree. Seam edges are never offered.

The wall grows INWARDS, so the outside of the part does not move. A wall that will not fit is refused rather than producing an invalid solid.

Removes the face and leaves the body OPEN — no volume, not watertight. That is the point: an interior face a game engine will never draw costs triangles in every frame. Mesh and STEP export both still work, and the Solid badge says open shell afterwards.

No material moves. The region the sketch encloses becomes a face of its own, so it can carry its own material or its own mesh density. Everywhere it lands also splits the far side of a through-projection.

STEP re-imports as editable B-rep geometry. The mesh formats are exactly what is on screen, at the current budget.

Sized by each chart's real millimetres, so one texture reads evenly across the whole part.

A checker over the packed UVs. Even squares mean even texel density; a stretched or sheared one means the chart needs work. The corner mark in each square shows which way up the island is.