VRay Standalone Inconsistent Compiling Geometry

[peepo]

Im running VRay 3.5 with MODO v11.1 on a iMac, and if I render the same scene, sometimes the 'compiling geometry' stage happens very quickly in seconds), other times, it seems to hang for a long time (many tens of minutes) with estimates of 3h to loads the geo. Often the MacOS seems to kill VRay standalone too. I know that this is something that the MacOS is doing, but it's extremely frustrating when trying to redner. I've tried the same at least 6 times today, and still no results.

On previous it has rendered absolutely fine - Im not sure where this inconsistency is coming from. Any help greatly appreciated - thanks!

[vladimir.nedev]

Are you sure it's exactly the same scene ? Same camera position ? Same geometry ?
When you render through V-Ray Standalone, you can tell it to keep the .vrscene and .command files after the rendering.
You can use those to start the same render multiple times, just double click on the .command file.

Greetings,
Vladimir Nedev

[peepo]

Hi Vladimir

Many thanks! You are right, it's not 100% exact, but has had very minimal changes - for example minor bit of geo was moved about the scene. The trouble is the VRay Standalone seemed to be stalling when loaded the images maps, which it was not doing previously (with the same maps). It would stick here for a long time, then be dead sluggish afterwards, until MacOS killed it. The first full render at high res worked absolutely fine though.

After many unsuccessful attempts on my fast machine, I've currently got the render going with VRay standalone my second (much slower) machine, which is going through the render ok, and not exhibiting the same behaviour.

+ I'll tell it to keep the scene files - I'll investigate doing this.
+ Is there any caching going on that could have become corrupted? If so, i it possible to clear out everything to start afresh?

If there is anything that I can provide that would be useful to you to debug/investigate, please just let me know.
Thanks for your help

[vladimir.nedev]

+ Is there any caching going on that could have become corrupted? If so, i it possible to clear out everything to start afresh?

Nothing that I can think of.

Can you run some memory and HDD diagnostics on that machine ?
If it renders fine on one machine, but has problems on another (even after a restart), it is possible to be a hardware/OS problem.

Greetings,
Vladimir Nedev

[peepo]

Hi Vladimir

Of course- I would be happy to. I'll do that next free session and email them to you...

Thanks!
Pali