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Author Topic: Slower geometry processing with version 4  (Read 6397 times)


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Slower geometry processing with version 4
« on: October 26, 2019, 09:00:10 PM »
I know this is the lite forum but just wanted to let you know that version 4 takes a lot longer to process geometry at render time compared to version 3 and it might be something you want to take a look at.

I installed the update hoping that it would actually decrease render times on a project I am currently working on, but it was the opposite.

Rendering with vray Next gpu:

Railclone 3.3.1 compiling and exporting geometry takes around 30 seconds
Railclone 4 compiling and exporting geometry takes around 1.5 minutes

I did a lot of testing in order to be sure that it was in fact an issue with railclone version, rolling back and forth between the two until I finally narrowed it down to the curve steps option, I have a very simple setup, just 1 segment along 1 curved spline but my segments have very organic geometry and had to set curve steps up to 500 in order to avoid deformation, it turns out version 4 doesn't like this at all, once I lowered the curve steps the processing times went down proportionally, the times improve for version 3 as well, but not as dramatically as for version 4, so I managed to optimize my railclone setup and now I am using between 100 and 200 curve steps, got a little speed improvement but I am sticking with version 3 because its still faster than version 4.


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Re: Slower geometry processing with version 4
« Reply #1 on: October 28, 2019, 10:43:39 AM »

I have tried to reproduce it but have not succeeded. It would help us to identify the issue if You could send us Your example scene.