Mental Ray Q&A

Hi mental ray users and lovers,

Even though the Mental Ray Forum has disappeared recently from the web, we are here to help you with issues you might have with the Mental Ray plugins or the Standalone. Just ask your questions in the comments and we will try to come up with an answer in a new blog post.

For example, I wonder if and how you are using the GPU capabilities in Mental Ray, like the “GI Next” Global Illumination acceleration, or the fast GPU mode of Ambient Occlusion?

We are also interested in art work and renderings done with Mental Ray that we would love to highlight on this blog.

Happy to hear from you,

Steffen

Mental Ray Licensing Update

Hi Mental Ray users and lovers,

over the course of the past 12 months, we have converted most of you, the existing and eligible Mental Ray customers, to a perpetual licensing model. That is giving you plenty of time for finishing current Mental Ray projects and for transitioning to alternative renderers in the coming years.

As some of you have noticed, the NVIDIA Licensing Portal was shut down earlier this month. That means, the option to manage your license tokens and generate license files yourself is not available any longer. We are working on a different solution that will allow you to move Mental Ray to another machine easily. We are going to announce any news here, on this blog.

Please do not hesitate to contact arc-licensing(at)nvidia.com in case of licensing issues or requests.

Happy (and uninterrupted) rendering!

When the Mental Ray Installer fails…

Hi all,

we got several reports that the installation of the Mental Ray products on Windows systems may fail, or may not start at all. It turns out, that this happens when the latest NVIDIA drivers (version >390) have just been installed before the plugin.

The reason is: the NVIDIA installer framework keeps some files on the system, in order to speed up subsequent installations, and to retain a history. The latest installer version coming with the most recent drivers is not compatible with the older Mental Ray installer version, unfortunately. We are working on a fix.

UPDATE:

The latest Mental Ray for Maya installers have been fixed.
For the Mental Ray for 3ds Max installer, please try this workaround:

Rename, or remove the cache files in the directory

C:/Program Files/NVIDIA Corporation/Installer2

Then run the MR installer again. This operation will invalidate the NVIDIA installer file cache, so followup installations may need longer because starting from scratch since the installation history is lost.

Sorry for the inconvenience, and Thank You for your patience.

Steffen

mental ray for Maya 2016 SP2

mental ray for Maya 2016 SP2 is now available for download here or it is automatically installed by the Autodesk Application Manager.
It ships with mental ray 3.13.1.9 which contains improvements for the BSP2 acceleration structure in certain cases, bug fixes for multi-host rendering and for some framebuffer handling issues. The release notes provide more details.

Several bugs were fixed in the mental ray for Maya translator, notably concerning undo when modifying simple mila_material parameters, satellite rendering issues, and a workflow improvement with regard to the new Create->Lights menu and Environment lights.