With Support Mode set to "Only User-Selected Discrete Points/Lines" above, these tables define the only boundary restraints. Line supports generate nodal restraint chains along the 3D vector. Make sure enough DOFs are locked across nodes to prevent rigid-body motion.

An empty table means zero external load. If self-weight is also switched off below, the solver correctly returns a flat, zero-stress result — that's the expected physical answer for an unloaded body, not a bug.

"Void" forces elements inside the box to stay empty regardless of what the optimiser would otherwise choose — useful for service penetrations, ducts, or doorways. "Forced Solid" pins material in place instead — useful for bearing pads or fixing zones. Overlapping a region with a load/support point produces an invalid model, so keep regions clear of load/support coordinates.

Volume fraction sets the target proportion of the domain kept as solid material (0.90 = 90% by volume). Iterations sets how many SIMP optimisation passes run — more iterations generally converge to a cleaner, more resolved topology at the cost of longer solve time.

Adjust limits between 0.01 MPa and calculated peaks. Elements outside range render in Studio Grey.