octane crashing on cached scene

[asamaniego]

Hello,

I've been having an issue with octane crashing on a scene I cached. Octane works great until the cache frame size goes over 1.5 GB. I don't believe this is a hardware issue as I don't have any issues with the same scene when I use redshift or mantra. My hardware is a 1950x threadripper and two 1080 ti's 11GB. I tried two other scenes and have been having the same issue with octane. Once over 1.5 GB it'll say preprocessing scene and then crash. Any ideas what it could be or if there's anything I could do. Thank you.

[juanjgon]

Hi,

Can you please enable the Octane log file in the plugin options panel to check what is the error that Octane is reporting after the crash? I remember that Octane had some limits in the amount of geometry that it can manage in a single object, so in this case I'm afraid that you are going to need to break the object into several OBJ nodes to avoid this issue, but let's check the reported error first.

Have you tried to render your scene enabling the out of core feature, also available in the plugin options panel?

Thanks,
-Juanjo

[asamaniego]

Thanks for the help. Here is the log file. I'm not really sure where the problem is coming from. I also tried enabling the out of the core feature, but that didn't work.

[juanjgon]

Hmm, perhaps as I've said you could be reaching the max number of points/polygons allowed in a single OBJ node, but to be sure, can you please send me this scene?

Thanks,
-Juanjo

[asamaniego]

I broke the cache down into two separate nodes and that has worked. It's a bit of a hack fix, but it works for me. I'm happy to post it with a single cache file, but I think we would need a goggle drive...the cache file is around 1.8GB. Maybe that can help to analyze the situation more?

[juanjgon]

How many polygons do you have in this object? I'm fairly sure that the problem comes from having a huge number of triangles inside the same OBJ nodes, something that unfortunately doesn't have a fix yet.

Thanks,
-Juanjo

[asamaniego]

I don't have any polygons, but have 37.8 M points...does that make sense?

[fantome]

have you try to load your .obj point cloud in houdini , and then resave it as an .abc point cloud , then render the .abc in octane ?
.obj is a really old and not optimised format for object description.

[juanjgon]

I don't have any polygons, but have 37.8 M points...does that make sense?

Yes, it could be the same problem related to the amount of information that Octane can handle into a single object node. Are you rendering them as Octane sphere particles or as instances?

Thanks,
-Juanjo

[asamaniego]

I'm rendering as sphere particles.

@fantome - I've never even thought about doing it that way. I'm not really sure where I would begin.