One of our top nodes in our toolsset.
Several different methods for automatically generating UVs on input meshes.
Name of the output attribute
Algorithm used to generate the UVs
The Shortest Path method, will identify areas of high curvature on a mesh and then draw shortest paths between those points.
Fuse Threshold in case paths are too close together
Number of Paths
Number of high curvature points to use as path points
Attract the seams based on high convexity (helpful for hard surface models)
Attract the seams based on Ambient Occlusion (helpful for organic models)
Clusters primitives based on position and normal attributes to generate islands
Number of Clusters
Number of Islands to be generated
Blur the Normals a bit when considering which normals are close together (will merge islands together)
Randomly change the clustering
Use the build in UV Unwrap node. While usually not the best solution, this combined with Merge Small Islands is generally one of the best solutions.
Number of Projection Planes.
Use the new UV Autoseam node
When Splitting is "Curvature based", controls how sensitive grains are to changes in normal direction across surfaces. A value of zero is very sensitive and produces tiny grains. Larger values up to 1 are less sensitive and produce larger grains.
Controls how often smaller grains merge to become larger islands. 0 never merges (giving the initial grains as output), 1 merges all connected grains together (giving no seams in the output). You can tweak this control, centering around 0.5, to get more or fewer seams.
Merge Small Islands
Consolidates Small UV Islands into Larger Neighbors
Small Island CutOff
Size threshold of the islands that will be merged back into larger pieces
Optimize UV Border
Attempts to cleanup triangles that are sticking to the side of the UV island. May cause small islands to reappear
Defines how to flatten the Islands.
How to rotate the islands when packing
How many times to attempt fitting the islands together
How many pixels to pad the islands by
Reference Resolution for Island Padding