Decrease triangle count by merging triangles at the cost of the original shape
The triangle reduction tool is used to combine triangles where possible to eliminate complexity and speed up computation for various operations.
- Click
Refine Mesh > 
Reduce Triangles.
- Make your adjustments as needed:
- Adjust the Target edge length to control the maximum allowable edge length of the combined triangles.
- Adjust the
Target Triangle Count to explicitly control how many triangles are reduced.
Note: If you have a very fine mesh, we recommend you conduct the triangle reduction in several steps to avoid the possibility of creating double surfaces or other side effects. A good reduction target to start with is about half of the current total.
- Adjust the Maximum Average Deformation value to control how much the part is allowed to deform as a result of the triangle reduction.
- Select whether to reduce only those areas composed of triangles that are currently selected.
Note: If no triangles are selected when you open this dialog, this option is grayed out.
- Enable the Fast Mode check box to stop reducing triangles immediately when the target triangle count has been reached even though there might be more areas suitable for reduction. It can be useful to use for testing target triangle counts.
- Click OK to run the reduction.
The number of triangles is reduced without distorting the part.