Tweet
im just tarting up a scene i did a while ago, and replacing 8,000 proxy trees of approx 200,000 faces each, with 20,000 proxy trees of approx 800,000 faces. the materials are almost identical (vray2sided on the leaves, specular highlights, but refs disabled in materials.)
id just like to understand the effect on the scene. having swapped those over, my rendertimes have gone from 20 mins to 8 hrs a frame, and my ram usage has gone from 8 gb to 25 gb.
now ram usage isnt a problem as i have 32 gb in my machines.. (although in the end id like it under 24 for sending to a farm)
but im wondering about the vast rendertime increase. i guess the increased geometric detail will cause the dmc sampler to work harder, that will be unavoidable, but since the original scene had thousands of trees in the distance anyway, it should already have been being hammered. so im surprised at the size of the change.
also, firstly, it spends almost 15 mins "transforming vertices" which it never did before.. surely since they are proxies, no work should be done on the meshes until they are loaded for each bucket..? secondly the only material difference is i now have a map in the vray2sided "translucency" slot.. could this increase the rendertime drastically?
also if i cancel, or it finishes a frame, it now takes about 10 mins on the "vray lens effects" progress bar. how should swapping proxies affect this?
i appreciate i really should optimise the tree models for the far areas, but keeping the look the same whilst reducing polycount drastically on trees is quite tricky, the leaves are as simple as they can be, and ive removed all fine twigs already.
i guess using the "proxy point cloud" would be one option, but last time i tried there was a real issue with point size multiplier.. the discs were way too big by default and using low sizes caused the proxy export to fail (noted by vlado at the time.. no idea if this is fixed yet..)
id just like to understand the effect on the scene. having swapped those over, my rendertimes have gone from 20 mins to 8 hrs a frame, and my ram usage has gone from 8 gb to 25 gb.
now ram usage isnt a problem as i have 32 gb in my machines.. (although in the end id like it under 24 for sending to a farm)
but im wondering about the vast rendertime increase. i guess the increased geometric detail will cause the dmc sampler to work harder, that will be unavoidable, but since the original scene had thousands of trees in the distance anyway, it should already have been being hammered. so im surprised at the size of the change.
also, firstly, it spends almost 15 mins "transforming vertices" which it never did before.. surely since they are proxies, no work should be done on the meshes until they are loaded for each bucket..? secondly the only material difference is i now have a map in the vray2sided "translucency" slot.. could this increase the rendertime drastically?
also if i cancel, or it finishes a frame, it now takes about 10 mins on the "vray lens effects" progress bar. how should swapping proxies affect this?
i appreciate i really should optimise the tree models for the far areas, but keeping the look the same whilst reducing polycount drastically on trees is quite tricky, the leaves are as simple as they can be, and ive removed all fine twigs already.
i guess using the "proxy point cloud" would be one option, but last time i tried there was a real issue with point size multiplier.. the discs were way too big by default and using low sizes caused the proxy export to fail (noted by vlado at the time.. no idea if this is fixed yet..)
Comment