This is a pure solid, procedural material. It can be applied with minimal effort and never shows unnatural distortions, seams or pixelation. Especially suitable for constructions with visible joints.
It uses a two layer approach to control the overall ring distortions as well as the irregularities of the single rings:
- The outer layer (called "trunk") divides the space into two major rings. It allows to produce excentric ring patterns similar to those of real trunks, which are never perfect round (caused by changing growth conditions and the like).
- The inner layer generates the year rings itself. It can be split into 2 different textures to distinguish heartwood and sapwood.
- Load the .rmtl file into Rhino's material editor or open the .3dm file in the package to start with a textured sample (the later contains also the original layer names which get lost when exporting to .rmtl).
- Assign the material to your model.
- Select the model and create under "Properties -> Texture Mapping" panel a new Planar (UVW) mapping. Define a cube of 500x500x500mm to get approximately real life ring spacing.
- Turn on "Show Mapping" and change display mode to Raytraced (Cycles). Adjust the mapping widget until the model shows satisfying texturing.
- Change the material list to "Tree" view to see all texture layers of the materials.
- Select the "trunk" layer and change the "Radial / Axial noise" values to get a more or less knarled piece of wood.