Hi ,
There is no definitive answer on this with exception that you want to setup LODs to squeeze out better performance where you can.
Some things to consider when making your LODs:
- Know the quality bar you’re setting for your project.
- Know what your target platform is and the target FPS you want to hit
- Use up to 4 LODs (Base, and 2 lower LODs and a Billboard for the last LOD with foliage like trees)
- Use the LOD screensize to switch at specific LODs when needed.
As for Polycount this is a subjective question that can only really be answered with some best practices rather than specific numbers. For instance, if you’re going to target PC then you can more than likely hit the higher fidelity mark without as much worry, where as someone with a lower-end machine may have more issues. I think 8180 is within reason, and depending on your quality needed may be a little lower than you would want.
I hope this helps.
Tim