Mapping Method for Multi-Material Object

If you have a compounded model where each component model has its own material or texture, re-generating UV will be done by the following rules. We will take Box UV Setting/X/Tiling (U, V)=(1.00, 1.00) as the mapping method as example.

(When you do material assignment or texture mapping to individual faces in SketchUp, it generates a compound model with several material settings.)

Single Model, Single Image as Texture

When you have a single model with its faces mapped by one single image and you apply the UV settings as described above, the result will be like the illustrations below.

Partial parts of one image are mapped to different faces.	UV Setting: Box Align: X Tiling (U, V): (1.00, 1.00) The whole image will fit into each face.

Single Model, Multi Images as Textures

When you have a single model with its faces mapped by several individual images and you apply the UV settings as described above, the result will be like the illustrations below.

Partial parts of two images are mapped to different faces.	UV Setting: Box Align: X Tiling (U, V): (1.00, 1.00) Each image will fit into corresponding face.

Compounded Model, Multi Images as Textures

With the concept above, if you have a compounded model with multiple textures, once you apply the UV settings, they will affect all individual components, which differ from the traditional mapping method.

Partial parts of two images are mapped to different faces of two components of the compounded model.	UV Setting: Box Align: X Tiling (U, V): (1.00, 1.00) Each image will fit into corresponding faces of the two components of the compounded model.