Instantiating thousands of blocks gives big performance drop

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i read about using MultiMeshInstance3d able to generate lots of stuff without fps drop, then i found this Visibility ranges (HLOD) — Godot Engine (stable) documentation in English

and this

Fastest way to generate and render cubes

Reply From: Zylann Godot 3.1 frustrum culling isn’t the best around, you will easily have a CPU bottleneck if you want to draw a lot of mesh instances. That’s why reducing their amount (by increasing chunk size) improved performance. I assume the code you used to connect quads also discards quads that are not visible? You should make sure you are not generating mesh instances for chunks that don’t actually have any quad visible. This will help reducing the am…