UVW texture is a professional term in 3DMAX. UVW usually refers to the texture coordinates of the object.
3DMAX uses the three letters UVW to represent the three axes of XYZ. U represents X, V represents Y, and W represents Z. UVW textures are generally used when the texture coordinates are lost, and can also be used when you want to set the texture location in detail. Because textures are generally flat , texture coordinates generally only use the UV term, and the W term is rarely used.
That is to say, if you make a model and you want him to add a specific texture, you need to perform this UV unfolding operation.
The unfolding process is not clear in one sentence or two. There are similar industry standard references here. Find a tutorial for developing UVs. Basically, those are the contents. After the expansion, the points of each texture will be clear at a glance. Then edit this UV map in the PS software. What texture you set will show what texture the corresponding model will display.
SketchUp's ability to adjust the texture is still relatively poor, especially in the early version of SketchUp, even a spherical texture and a cylindrical texture have been engaged for a long time. Now the SketchUV tool can quickly solve this problem. Its toolbar has two icons. On the left is the "UV Map" tool, on the right is the "Path Selection" tool (above). If we click on the "UV Map" tool, the texture adjustment function is already activated. At this time, if we click on any face, a "context menu" will pop up (below).