LuxCoreRender Forums

Hi. Is it possible to use only Cuda without optix for Gtx Series? Since Luxcore 2.5 I am experiencing much lower performance from my gtx 1070ti on desktop and gtx 1660ti on my laptop?. Can someone give example how to modify Luxcore config files.? Thanks

Hi. So I am experiencing vieport render crash with cuda and opencl on mobile gtx 1660ti 6gb with Blender 3.0 and latest daily 2.61alpha, Windows 11, latsest Nvidia drivers. LuxCore2.1Benchmark scene. console output CUDA: [LuxRays][68.453] [Optix][4][DISK CACHE] Cache data size: "25.4 KiB" ...

Cool. I asked Cycles users for their opinion on this, and they told me that you have to use Scrambling Distance for such scenes. This will speed up the Cycles so much that it becomes much faster than Luxcore. I think Scrambling Distance is not available in vanilla Blender... for that you need Bone ...

Manifold Next Event Estimation Sampling Technique implemented in cycles.
https://developer.blender.org/D13533

Here in action...

https://www.youtube.com/watch?v=UbWWhPmqV5E

I have also downloaded and tested OctaneBench with RTX option enabled and it works perefctly fine on gtx1660ti.

I dont see anwhere in blender addon option to disable Optix?? I think it may be an option not exposed in Blender (because it is not usually useful). I can explain to you how to run LuxCore stand alone version and how to enable/disable options but it somewhat complex if you are not familiar with com...

It may be related to Optix (i.e. RTX where available support). You should try to enable CUDA but disable Optix. Optix has shown to be very slow in some cases in some not-RTX GPU. I dont see anwhere in blender addon option to disable Optix?? My gtx 1070ti on desktop machine works perfectly fine... C...

Hello For some reason on my Lenovo Legion with gtx 1660 ti I am experiencing vero low samples/sec with CUDA rendering. I have used danish mood scene and the results are: Cuda samples/sec 50K Opencl samples/ sec 2.0M Same results on Luxcore 2.5 and daily 2.6 Tested on windows 10. Cycles working with ...

TAO wrote: ↑Mon May 24, 2021 4:54 pm

sarmath wrote: ↑Mon May 24, 2021 1:55 pm

TAO wrote: ↑Sun May 23, 2021 7:05 pm Generally great job, well done.
I can mention there is an irregularity with the rounded planet that I think shouldn't be there.
Screenshot 2021-05-23 210457.jpeg

Yes looks like shading issue.

or perhaps normal issue

It looks ok with cycles material..

TAO wrote: ↑Sun May 23, 2021 7:05 pm Generally great job, well done.
I can mention there is an irregularity with the rounded planet that I think shouldn't be there.
Screenshot 2021-05-23 210457.jpeg

Yes looks like shading issue.