Tweet
Hello!
Im doing alot of retail renders and therefore love using Lightmix! to be able to control lights on the go in the VFB! I feel I have noticed an extreme slowdown with Vray gpu and using lightmix, It feels way to slow to use compared to the loss in render speed.
I have upgraded my system recently to a 5090 system. Running all the benchmarks everything is fine - Averaging the 15k in rtx benchmark! And GPU load 100% tracked with Gpu-Z!
I open a standard scene in 3dsmax 2025 with lightmix enabled, maybe 40 Unique lights in lightmix that needs to be controlled~ Mixed vray mesh lights, vray ies lights and regular vray lights (Plane, sphere etc.)
When I render I get extreme GPU load spikes - Instead of maybe between between 70-100~% I would expect? I go from as low as 1% to around 80% and render speeds drop immensely! - Final render time for the frame 20min~
WHen I render with Lightmix Disabled I get GPU load 100% and expected render speeds! - Final render time for the frame around 9min~
Is the Lightmix really expected to slow down this much with 40 light groups?
It happens in all my scenes using Lightmix!
Kind Regards
Im doing alot of retail renders and therefore love using Lightmix! to be able to control lights on the go in the VFB! I feel I have noticed an extreme slowdown with Vray gpu and using lightmix, It feels way to slow to use compared to the loss in render speed.
I have upgraded my system recently to a 5090 system. Running all the benchmarks everything is fine - Averaging the 15k in rtx benchmark! And GPU load 100% tracked with Gpu-Z!
I open a standard scene in 3dsmax 2025 with lightmix enabled, maybe 40 Unique lights in lightmix that needs to be controlled~ Mixed vray mesh lights, vray ies lights and regular vray lights (Plane, sphere etc.)
When I render I get extreme GPU load spikes - Instead of maybe between between 70-100~% I would expect? I go from as low as 1% to around 80% and render speeds drop immensely! - Final render time for the frame 20min~
WHen I render with Lightmix Disabled I get GPU load 100% and expected render speeds! - Final render time for the frame around 9min~
Is the Lightmix really expected to slow down this much with 40 light groups?
It happens in all my scenes using Lightmix!
Kind Regards
