Does anyone else see their frame time go up far more than expected when viewing trees close up? For me, I’ve no problem with thousands of billboarded trees, or a good number of trees without LOD but at a further distance (say > 10m). But as soon as I get within a close distance of a few, the frame time goes up dramatically. This is in VR of course. In desktop mode, the frame time hardly goes up even with a lot of nearby trees.
It doesn’t appear to be related to tricount or draw calls, as even with significantly lower of both I’ve still seen my frames go up significantly when getting close to several trees. I’ve also tried to simplify the tree materials, and use more low-poly models, to no avail. I suppose it’s overdraw that could be doing it? Regardless, I’d like to hear from some others who have tried using trees in VR, maybe it’s just me who’s experiencing this.
Here’s my setup for reference:
GTX 1060, Ryzen 2600x, 16GB of RAM
UE 4.26 with forward rendering