wood knots

Hi @peppe_esposito0605,

Thank you for the question.

The wood resource is in two parts.

1.  A wood .SBSAR material made in Designer
2.  A Greyscale Layer in Painter (where he paints in the video) that is called by the .SBSAR material with an Anchor Point.

The Greyscale Layer drives where the .SBSAR material should add a knot. If you want to build something similar, you'll need to learn Substance 3D Designer and how to expose parameters.

Best regards,