particle instances - insanely long lead-up time to render

[wizzackr]

hi guys, i'm really at a loss (and short of time), so please bear with me: we have a scene for an aerial perspective, which renders just fine (i.e. the geometry, textures and shaders etc.).

Now for the trees we used a script of ours, which basically scatters particles to certain positions, gives them 10 or so IDs and instances loads of trees in form of vray proxies to those. we have about 10 different particle systems in the scene, each loading the same 10 proxies. Now once we hit render, it takes literally 5 hours or so before vray starts to do the lc computation! What could be causing this?

Here is the output log until it gets stuck:

V-Ray: Starting render
[2016/Jan/18|17:11:20] V-Ray: Exporting scene to V-Ray.
[2016/Jan/18|17:11:20] V-Ray: Parsing light links time 0h 0m 0.0s (0.0 s)
[2016/Jan/18|17:11:20] V-Ray: Translating scene geometry for V-Ray
[2016/Jan/18|17:11:21] V-Ray: (Estimated time remaining: 0h 0m 0.6s): 60 % completed
[2016/Jan/18|17:11:21] V-Ray: (Estimated time remaining: 0h 0m 0.4s): 74 % completed
[2016/Jan/18|17:11:21] V-Ray: (Estimated time remaining: 0h 0m 0.3s): 80 % completed
[2016/Jan/18|17:11:23] V-Ray: Total time translating scene for V-Ray 0h 0m 3.4s (3.4 s)
[2016/Jan/18|17:11:23] V-Ray: Rendering.
[2016/Jan/18|17:11:23] V-Ray: Clearing bitmap cache memory...
[2016/Jan/18|17:11:23] V-Ray: Rendering frames.
[2016/Jan/18|17:11:23] V-Ray: Updating frame at time 1.00
[2016/Jan/18|17:11:36] V-Ray: (Estimated time remaining: 0h 1m 54.7s): 10 % completed
[2016/Jan/18|17:11:39] V-Ray: (Estimated time remaining: 0h 1m 3.9s): 20 % completed
[2016/Jan/18|17:11:44] V-Ray: (Estimated time remaining: 0h 0m 42.8s): 32 % completed
[2016/Jan/18|17:11:45] V-Ray: (Estimated time remaining: 0h 0m 32.2s): 40 % completed
[2016/Jan/18|17:11:46] V-Ray: (Estimated time remaining: 0h 0m 20.6s): 52 % completed
[2016/Jan/18|17:11:46] V-Ray: (Estimated time remaining: 0h 0m 1.2s): 95 % completed
[2016/Jan/18|17:11:47] V-Ray: Total time updating frame 0h 0m 23.6s (23.6 s)
[2016/Jan/18|17:11:47] V-Ray: Preparing renderer...
[2016/Jan/18|17:11:47] V-Ray: Using Intel Embree ray server
[2016/Jan/18|17:11:47] V-Ray: Preparing scene for rendering...
[2016/Jan/18|17:11:47] V-Ray: Creating bitmap manager
[2016/Jan/18|17:11:47] V-Ray: 1 lights found.
[2016/Jan/18|17:11:47] V-Ray: Max ray intensity is enabled: rendered result may have incorrect brightness.
[2016/Jan/18|17:11:47] V-Ray: Preparing scene for frame...
[2016/Jan/18|17:11:47] V-Ray: Mesh file "blahblah.vrmesh" linked successfully.
[2016/Jan/18|17:11:47] V-Ray: Mesh file "blahblah.vrmesh" linked successfully.
[2016/Jan/18|17:11:47] V-Ray: Mesh file "blahblah.vrmesh" linked successfully.
[2016/Jan/18|17:11:47] V-Ray: Mesh file "blahblah.vrmesh" linked successfully.

...had to change the name because of NDA. They all load and link without problems.

[2016/Jan/18|17:11:49] V-Ray: Compiling geometry...
[2016/Jan/18|17:11:54] V-Ray: Using embree ray tracing.
[2016/Jan/18|17:11:54] V-Ray: Building embree static accelerator ...
[2016/Jan/18|17:11:54] V-Ray: Building embree static trees took 228 milliseconds
[2016/Jan/18|17:11:54] V-Ray: Building embree static hair ...
[2016/Jan/18|17:11:54] V-Ray: Static hair tree statistics:
[2016/Jan/18|17:11:54] V-Ray: Memory usage: 8 MB
[2016/Jan/18|17:11:54] V-Ray: Number of hair systems : 2
[2016/Jan/18|17:11:54] V-Ray: Number of bezier curves: 58410

and here it hangs for 5 HOURS before it renders away. Anyone??

[ivaylo.ivanov]

What is the memory usage? Try turning on "Use local Ray server" and if turning off view dependent subdivision/displacement if you are maxing out your memory:

http://docs.chaosgroup.com/display/V...cal+ray+server

[wizzackr]

from the link you sent i take it this is a mesh Attribute - what to apply it to, though? The proxies?

[yolov]

You can apply it to the shape (meshShape) node. It's one of the nodes within a vray proxy object.

[wizzackr]

I will try that, but when the system hangs it has 4% CPU usage and RAM doesn't go above half the system's memory

[wizzackr]

ok, that wasn't it. still hanging...

[tashko.zashev]

Hi,

Is there any chance to get this scene for testing ? It will be easier for us to troubleshoot it further.