Texture Channel UV Offset and Tiling

Mapping Issues from Google SketchUp and 3D Warehouse

We can easily download SketchUp (SKP) 3D models and convert them into iClone. In iClone, we can further alter the material settings; even apply multiple texturing effects to make the model look more realistic.

However, if the original model from Google SketchUp has no prior texture assignment (purely with default color material), when you apply texture in iClone, the result may not be what you expected.

In the sample above, the solid blue color is made by massive grainy texture tile on this model (with the default 1x1 UV tiling settings in iClone). If the model in Google SketchUp has no prior texture assigned to it, the default UV tiling value is way too small for further texturing works.

Custom UV Offset and Tiling

iClone provides Texture Channel UV Offset and Tiling features to solve this problem. You may then customize the offset and tiling values to each texture channel without changing the original Global UV Settings. You may use this feature to best align a texture map to the target faces as well.

ClosedNote:
  • Hold the up/down controls of the UV Offset, Tiling values to see the texture changes in the 3D viewer immediately.
  • Please refer to Synchronizing UV Changes to Channels for more information.

How to fix the grainy texture tiling issue

  1. Select a prop (in this case, some faces contain no texture) converted by 3DXchange from SketchUp.
  1. Press the Picker and click on the face without any texture to retrieve its material and texture settings.
  1. Select the Diffuse channel and click the buttons to load an image as the diffuse texture. The massive grainy texture tile makes it look like a solid color in the illustration below.
  1. Adjust the Tiling value to make the texture show an appropriate mapping result. In most SketchUp cases, it is a small value such as:
    Tiling U = 0.010
    Tiling V = 0.010

Adjusting Individual Texture Channels

By means of altering the values of Offset and Tiling to different texture channels, we can create all possible multi-texturing effects on SketchUp models.

Opacity

Bump

Tiling U: 0.050
Tiling V: 0.010

Tiling U: 0.010
Tiling V: 0.020

Specular

Glow

Tiling U: 0.010
Tiling V: 0.010

Tiling U: 0.040
Tiling V: 0.040