For troubleshooting installation and licensing issues, please check the installation PDF guide.

 

If you experience any problems not discussed below while using V-Ray, please write to vray@chaosgroup.com

 

My system locks up and freezes while rendering

Excessive memory usage while rendering

I get splotches in my rendering when using the irradiance map

 

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My system locks up and freezes while rendering

This is most likely a hardware problem. V-Ray cannot cause system freeze by itself. The worst that V-Ray can do is crash Rhino. Check your memory chips and/or your CPU temperature. If the crashes are limited to Rhino only and not the OS or computer please see "Excessive memory usage while rendering" below.

Excessive memory usage while rendering

Like every other program, V-Ray needs a certain amount of RAM to render the image. Depending on the scene complexity and the render settings, V-Ray will use varying amounts of RAM. Sometimes, the available system RAM may be less than the amount needed for rendering. In this case, you will most likely get an unhandled exception. You can check the memory usage from the Windows Task Manager.

 

On 32-bit machines, the Windows® operating system allows by default up to 1.5 GB for any single process (application). That means that even though you may have more physical RAM (for example 2GB), the operating system will not allow an application to use all of that memory.

 

However, on the Windows® XP operating system, you can change this by using the famous /3GB switch in your boot.ini file. This will enable the OS to allocate up to 3 GB of RAM for any given application. Using that switch may allow you to render your scene without using any of the methods below for reducing memory usage.

 

On 64-bit platforms, the 64-bit version of the Windows® operating system allows the usage of all available physical memory without limitations.

 

If you cannot use any of these methods to allow more RAM for rendering, the only choice is to reduce the amount that is needed by changing your scene and your V-Ray settings.The scene elements that take up most of the RAM while rendering can be divided into the following groups:

I get splotches in my rendering when using the irradiance map

There may be several reasons for splotches when rendering with the irradiance map: