Two kinds of judgement, from the people placed on the collection. The reviewers with Craftsmanship switched on take what DuoBench measured on your machine, the volume, the bounding size and whether the solid is closed, together with the rendered picture, and judge whether it was built right. The designer who drew the final sketch takes the picture and the sketch and judges whether this is the piece that was drawn. Each gives one verdict, pass or send back, with its reason, and says so in the collection's room; the tool strip reads Judging the 3D model, then 3D model judged. A review costs what a review costs.

Your own verdict, written into the same record as the reviewers'. 3D passes needs no reason and is filed as Passed by the owner. Send the 3D back asks What is wrong with it? and offers six answers, the form first: The form is off for a model whose outline and run do not follow the drawing even when every figure is right, then Wall too thin or uneven, Seat or cup does not fit the stone, Prongs or posts wrong, Proportions differ from the sketch, Surface or edges not clean. Each is a word you pick; nothing compares the shape with the drawing on its own.

The 3D tag on the piece's card shows the outcome: a tick when it passed, a cross when it was sent back, and the cross is red, as a failed build is. Rest on the tag to read the reason on each dimension. A rebuild clears the tag and the model is reviewed again.

Hand in a .3dm now asks Add a picture of the model?: Yes, choose a picture from the portfolio, or No, the model alone. The reviewers judge from a picture, and a .3dm file is a model, so a model handed in without one cannot be reviewed; asked to, DuoHand says so and asks for a picture first.