Here is video where i try to explain the issue.
1. Imported model with UV-s
2. Trying to paint with particle brush but has heavy lag and many particles stay in mid of air. * Model was sculpted in Zbrush
* UV-s were done in Unfold 3D (Using UDIM-s)
* Basic textures were done in Mari but are not imported to substance
I wanted to try substance painter as it has plugin for Houdini. System i have: CPU: AMD Threadripper 1950x
RAM: 128 GB DDR4 / 3200 / CL14
GPU: AMD Vega 56
Motherboard: ASRock Taichi x399
Disk Drive-s
Samsung SSD 970 PRO 512GB
Samsung SSD 960 EVO 250GB
+ external SSD-s
Operating system is Windows 10 Pro (64 bit)
https://youtu.be/u_hLdq99pgM