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Lod explanation wanted

I don’t have to much experience using lod’s but i have a few questions… my understanding is multiple poly meshes etc… But how long does the render take to transfer between… is their a huge diff…

The transition is handled by the engine and will be nearly instant, but the transition speed is relative to mesh complexity, higher poly count will (very slightly) increase load time. Same rules as normal mesh creation apply, keep your poly count as low as possible!

Here’s a guide from Epic that goes over how to work with LOD’s in UE4:

And another on how to set up LOD’s (scroll down and select the mesh editor you’re using, 3dsMax or Maya (no blender unfortunately), then scroll down to the LOD section):