It's just a matter of wanting the highest quality result at the shortest switch distance. I dunno what 30m translates to at your fov but the normal transition distance is lod B at 8-10m (30k triangle target), lod C at 40m (10k target), lod D at 100m (2k target, 2 materials). Lod B is about this large onscreen when it appears. You can generally tell that it switched (smoothing changes a bit) but it's not a worse looking model.Thanks @alekabul, I've never created LODs before but people always seem to consider them a PITA and a time-consuming process. I can't imagine there's a quicker and simpler way than your method, and the results are great. As you said, lights are intact. In VR (Rift) I couldn't see the LOD transition at 30m, possibly 25m, and thats from a 175k tri model down to 30k.