Slow processing, fast render

[ledisnomad]

I've worked with Vray for Rhino before, but am now using it with SketchUp. The problem I'm encountering is that when I hit render, the status bar reads "V-Ray is currently processing your scene, please wait..." and this processing takes much longer than the actual rendering. I'm just trying to get some small, 640x480 test renders. The file is relatively small, less than 5MB and about 50,000 faces. Any thoughts? Is this common for VRfSU? Are there ways to optimize this?

[thomthom]

What version do you have?

VfSU do tend to be slower to process - won't be as fast as Rhino in the best of cases - limitation of the SU API.
However, the latest version do appear to be better than the previous versions.

The previous versions quickly slowed down when you applied material to groups and components instead of directly to the faces.

[ledisnomad]

So I'm told that I have VfSU version 1.48 by IT. (In SketchUp in the Vray Options > About, it says 1.05... is that the Vray render engine?) So it's probably not the materials applied to groups/components. Any other suggestions? I've been cleaning up my model incrementally and I still can't get it to render (left for lunch, came back, still processing). What else could it be?

The model isn't so big: 14MB model, 2.16m edges, 71k faces, 1.8k component instances, 988 groups, 166 component defns, 10 layers, 24 materials (half have bitmaps in the form of jpgs and pngs).

My system is OK:

• Windows XP 32-bit, DirectX 9.0
• Dell Precision T3400, Intel Core 2 Duo E8200 @ 2.66GHz, 4GB RAM
• NVidia Quadro FX 570 (CUDA 16)

[ledisnomad]

So I finally got my model to render. I deleted all the materials and added them back one by one. One with a texture image caused it to crash. And applying a material to the big group really did slow down the pre-render Vray processing even though I have v1.48

But now I have a different problem if you'll see the image below. I can't show the whole image, but the white spots are pervasive. Here are the Vray settings (everything elsse is as it is default):
Camera: physical camera on
Output: 1024x703
Environment:
GI with physical sky and light set to Default (no lights added)
Background same as GI
Image Sampler: Adaptive Subdivs, -2 min, 1 max
Indirect Illumination:
Primary Engine = Irradiance Map
Secondary Engine = Light Cache
Irradiance Map:
-4 min, -1 max
Light Cache:
Subdivs = 1000, Sample Size = 0.01, Adaptive checked

Any suggestions?

[vidy]

hello ledisnomad,

try to change the following option:

• image sampler: adaptive DMC min 1, max 4, noise threshold 0.01
• light cache: untick adaptive

actually im using ver 1.05.30, hope it could work on your scene

goodluck,