Vertex Normal Toolkit for 3ds Max
You will get AAA nurbs shading quality for polygonal meshes.
scgstudio posts
If you look for a tools, which will aid you in export asset process to Unity3D and Unreal Engine 4/5 take a look :) :
MMVNF
Mirrored mesh vertex normal fix.
NOTE : If you do not have a good tool to make a perfect vertex normals look here: https://gumroad.com/l/VertexNormalToolkit
Script which can mirror selected meshes and keeps all normal information not distorted.
Supports edit and editable poly.
Does not collapse modifier stack.
ver. 1.5 supports hard edges. previous versions could transfer vertex normals 1 per vert...
