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Re: Optix/RTX support
Posted: Tue Jul 21, 2020 11:51 am
by Dade
Optix/RTX has the nice side effect of requiring quite some less GPU memory for the same geometry data.
This is a rendering with 60+ millions of triangles without Optix/RTX (i.e. CUDA-only):
and this with Optix/RTX (i.e. CUDA + Optix/RTX):
Note how Optix uses nearly 40% less GPU memory (4.4GB Vs 6.0GB).
Re: Optix/RTX support
Posted: Tue Jul 21, 2020 12:42 pm
by Sharlybg
Note how Optix uses nearly 40% less GPU memory (4.4GB Vs 6.0GB).
that is impressive. does it scale linearly ?
Re: Optix/RTX support
Posted: Tue Jul 21, 2020 2:27 pm
by Dade
Sharlybg wrote: ↑Tue Jul 21, 2020 12:42 pm
Note how Optix uses nearly 40% less GPU memory (4.4GB Vs 6.0GB).
that is impressive. does it scale linearly ?
Yes, it looks about linear with the number of triangles (and BVH nodes).
Re: Optix/RTX support
Posted: Tue Jul 21, 2020 6:14 pm
by Sharlybg
Yes, it looks about linear with the number of triangles (and BVH nodes).
2.5 will going to be a monster. Going to joke with people again with some tasty benchmark.
Re: Optix/RTX support
Posted: Tue Jul 21, 2020 6:15 pm
by Sharlybg
When will 2.5 build available for test ?
Re: Optix/RTX support
Posted: Tue Jul 21, 2020 6:43 pm
by Dade
Sharlybg wrote: ↑Tue Jul 21, 2020 6:15 pm
When will 2.5 build available for test ?
It is already if you know how to download artifacts from Azure but, anyway, the v2.5 branch will be merged with main one soon after the v2.4 release.
Re: Optix/RTX support
Posted: Sat Jul 25, 2020 6:51 pm
by bestman8
will this also be for gtx gpus for like a gtx1660 or gtx1080 or will this be rtx only and if rtx only does it not have any speed improvements for a gtx gpu or is that more work to make?
Re: Optix/RTX support
Posted: Sat Jul 25, 2020 7:00 pm
by Dade
bestman8 wrote: ↑Sat Jul 25, 2020 6:51 pm
will this also be for gtx gpus for like a gtx1660 or gtx1080 or will this be rtx only and if rtx only does it not have any speed improvements for a gtx gpu or is that more work to make?
I'm not sure about the GTX1660 but the GTX1080 should definitively work, it should also be a bit faster than our current ray tracing code, even without hardware RTX.
Re: Optix/RTX support
Posted: Tue Jul 28, 2020 4:08 pm
by Dade
It is now possible to disable Optix (even if it is enabled and available) with the property:
Re: Optix/RTX support
Posted: Tue Jul 28, 2020 4:21 pm
by Sharlybg
Dade wrote: ↑Tue Jul 28, 2020 4:08 pm
It is now possible to disable Optix (even if it is enabled and available) with the property:
Is it normal to not see optix in the first alpha build of blendluxcore. i know you said it is enable by default.