Make a playermodel out of anything you have modelled - a character you can walk around in, driven by the animations s&box already ships.

File > Make Player compiles it and writes a test scene with a floor and a player wearing it. Press Play and walk around.

Your model keeps its own shape. The built-in character's skeleton is fitted inside your model, so the animations only bend joints - a stocky robot stays stocky.

Help > Start Playermodel Tutorial walks it through in plain English, with an example robot to practise on, or start it on a model of your own.

The console names any bone whose spelling the animations did not recognise - almost always a typo, and the only place you would be told.

Transform handles in the viewport: drag arrows, rotate rings and a scale handle instead of typing three numbers. W, E and R switch between them.

Remesh reduces a dense import to a triangle budget, so a scan or a Meshy generation can finally be sculpted, rigged and compiled.

Subdivide is on the Rig bar now, where a too-coarse joint is actually found.

Marionette animates whole parts, not just bones - a door, a lever, a magazine, on the same timeline as the hand that works it.

A clip can hold several objects, each with its own skeleton: pose the hand, the weapon in it, and that weapon's bolt in one clip.

Marionette imports OBJ files split into their parts, with no .vmdl to compile first.