How optimize mesh (minimize tris and vertics)

Question

had a big model with 3,1M tris and 4,9M vertics. I want optimze mesh, short count tris and vertics. How do it?

Answer 1

import your model to blender and use decimator modifier to reduce vertex count then reimport it to unity.

blender docs decimator

Answer 2

MeshLab is a great tool for this.