@chippwalters said:

Please review occlusion culling:
https://docs.unity3d.com/Manual/OcclusionCulling.html

It works! I very thank you!

Hi!

   These tutorials are very helpful, it helped me a lot, thank you very much!

I also use SketchUp and Unity to prepare my thesis. And with your tutorials my game looks much better now than it was 1 year ago!

I'd like to ask for advice, I just discovered a new problem.

As a thesis, I make a 3D labyrinth game (for testing path search algorithms) and it is made up of 20X20 meter models (actually prefabs). If I put only few models in the scene, it will bring about 60 fps. But in more than 20 models, I get extreme fps drops if the camera is in the direction of a large number of models. All this despite the fact that there is a wall between them. But overall, they lose a lot of fps.

That is why I tested my models in an empty project without all kinds of effects, textures and lighting.Only SketchUV and basic Sketchup textures remained on them.

First I put 1 model into the scene and it's got about 90 fps. The same applies to the 4 models.
But in 10 models, it was only 70 fps. For the 30 models it dropped to 40 fps.
The problem is that I need about at least 200 prefabs per scene, but rather more.

What could be the problem?

My config:
CPU: Intel i5-3470 3.20 GHz
RAM: 20 GB DDR3
GPU: Radeon 6570 1 GB DDR3

The video card is pretty weak, but I think this pair of models should just endure.
I'm sorry, my English is not the best ...

Thanks in advance!