By default, Skimp tries to preserve as much of your model details as possible. This means that various 'boundaries' affect the ability of Skimp to simplify your model.
For example, texture coordinate (UV) and normal boundaries can greatly affect the simplification process. A UV boundary occurs when texture coordinates are not continuous across the edge of a face.
In particular, models that were exported from SketchUp into other formats (3DS, FBX, DAE) sometimes have lots of unnecessary UV boundaries.
Below is an example of a model with lots of UV boundaries. The texture is not continuous across the edges of the model.
Ways to Increase the Amount of Simplification:
We recommend following these steps in order. After each step, try to import / simplify your model again and see if you are happy with the results. If so, there is no need to follow the other steps.
- Disable the 'Maintain UVs' setting
- Disable the 'Maintain Normals' setting
- Disable the 'Lock Surface Boundaries' setting
- Disable 'Error Tolerance' or
- If 'Error Tolerance' is enabled, increase the error tolerance value.
- Lastly, try increasing the threshold values for Join Vertices, Join Normals, and Join UVs