How many polygon could be a high-resolution texture by polypaint in ZB ?

Here is my samll test. I imported a 1024x1024 texture to spotlight and paint on the soldier.

The Results

1. 30k polygons ~

2. 520k polygons ~

3. 2M polygons ~

Conclusions from the tests

Try to make model have about 2M polygons at last. It's safe to polypaint !