--- title: "Frequently Asked Questions" canonical: "https://documentation.chaos.com/space/VREVIT/161874132/Frequently%20Asked%20Questions" format: markdown --- To see the answer to the question, click to expand.

1. Does V-Ray for Revit support Revit LT?

Revit LT does not support any third party plug-ins. (*You can check this under API on the following page: **[http://www.autodesk.com/products/revit-family/compare/compare-revit-products?_ga=1.73906386.1596512571.1477395783](http://www.autodesk.com/products/revit-family/compare/compare-revit-products?_ga=1.73906386.1596512571.1477395783)* ) Due to these limitations, you cannot run V-Ray for Revit on Revit LT.

2. Are there more features in the product if it were licensed/purchased?

No, the licensed version is the same as the trial version.

3. I installed the trial version; however, when I go to use it in Revit, nothing is available except 2 icons: Enable V-Ray or License Server?

By default, when Revit is launched, your V-Ray for Revit license will not be automatically engaged, and the V-Ray toolbar will be grayed out in the UI. To pull your license and start using V-Ray, simply press the **Enable V-Ray** button. Please also see question 5 below.

4. I don’t want to click Enable V-Ray every time I load Revit. What can I do?

If you prefer your V-Ray license to be engaged automatically every time Revit is loaded, use the **[Obtain License on start-up](https://docs-chaos.atlassian.net/wiki/spaces/VREVIT/pages/161022018)**[ option](https://docs-chaos.atlassian.net/wiki/spaces/VREVIT/pages/161022018) located in the **Licensing** **tab** of the **Settings** panel. This option is disabled by default to provide users with flexibility in cases where: - The number of Revit licenses exceeds the number of V-Ray licenses. - Users are planning to share their V-Ray for Revit license/s across multiple machines (and multiple users respectively). If enabled, the first users that launch Revit will also automatically pull a V-Ray license, whether the intention is to use V-Ray in that session or not.

5. Where can I see my V-Ray for Revit version?

The version is listed in the **About** box after expanding the **Help** menu.

6. Where can I find the V-Ray for Revit material library?

Starting with V-Ray 6, the V-Ray Preset Material Library is moved to the Chaos Cosmos Browser. Materials that have already been downloaded with any earlier V-Ray version remain unchanged and can still be loaded as a custom folder. Please use the materials from the Chaos Cosmos Browser for any new projects.

7. Is there an HDRI image library that comes with V-Ray for Revit?

Chaos Cosmos offers a number of HDRIs in the HDRI category.

8. Can I create V-Ray materials in Revit?

Yes, you can create, edit, and save V-Ray materials using the [V-Ray Asset Editor](https://docs-chaos.atlassian.net/wiki/spaces/VREVIT/pages/160399494).

9. Can I use V-Ray for Revit materials in V-Ray for SketchUp as well?

Yes, the *.vrmat* material format is optimized to work in V-Ray for Revit, SketchUp, and Rhino as long as you are using the same version of the [V-Ray Asset Editor](https://docs-chaos.atlassian.net/wiki/spaces/VREVIT/pages/160399494) in each platform.

10. Can I use V-Ray for 3Ds Max materials in V-Ray for Revit?

Yes, you can. You will need to export those materials in a *.vrmat* format using the .vrmat Converter in V-Ray for 3Ds Max.

11. Why is the V-Ray toolbar grayed out when I open a camera view?

This occurs in all Revit versions before *2017.2* because the Revit interface locks out the controls for plugins while in perspective view. To unlock the plugin, open any non-perspective Revit view.

12. Are Revit Decals supported by V-Ray?

Yes, they are (including all Decals parameters and interactive actions as well).

13. I want to keep my Revit materials. Can I render them with V-Ray for Revit?

Yes, you can. You only need to have Revit materials assigned to the objects in your project. Once you render the project with V-Ray, all Revit materials will be automatically converted.

14. Are Chaos Scans compatible with V-Ray for Revit?

Yes, Chaos Scans are compatible with V-Ray for Revit.

15. Do Revit lights work in V-Ray for Revit?

Yes, V-Ray supports all Revit lights including IES lights. Revit lights dimming and light groups are supported as well.

16. I moved my material library to another folder, and now all my V-Ray materials are lost. Is there an easier way to restore them without remapping them one by one?

Yes, in the current project, go to the **Paths&Sharing** tab of the **Settings** panel. Under **Asset Paths**, add the new path to your V-Ray materials. Next time you click Render, V-Ray will find them and automatically use their new location.

17. Why do I get very weak shadows produced by the HDRI map?

The HDRI map needs a very high dynamic range to produce sharp shadows. You might need to replace the HDRI map that you are using with another one with a larger range.

18. Will all my V-Ray settings get lost if I open my Revit project on another computer?

No, the V-Ray settings are saved within the Revit project file. If you are using V-Ray 3.x for Revit or any other older versions, all your V-Ray settings are stored separately from the Revit project. You need to transfer them when using a different computer. For transfer instructions, please see question 20 below.

19. How can I transfer or re-use my V-Ray for Revit settings?

There are two ways to share or re-use your V-Ray settings. To re-use your own project preset or load and adopt other coworkers' settings when using worksharing, use the **Load from Project Storage** option. You can find it under **Settings >** **Paths&Sharing** **> Sharing**. Note that this option overrides the current settings. For more specific situations, such as saving your material and object replacements for further re-use across projects, follow the instructions below. Open the **Settings** window and go to the **Paths&Sharing** tab. Under **Share Settings**, select which V-Ray options categories you wish to export, then click **Export**. This will export the selected settings to an .*xml* file which can be imported for use in another project. To import the settings, go to the **Paths&Sharing** tab of the **Settings** dialog again. Click **Load** and navigate to the exported *.xml *file. The settings which had been exported and differ from the current project’s settings will appear by category in the **Import List**. Select which settings you wish to import, and click **Import** to import them. In case you want to load another *.xml* file, click the **Clear List** button.

20. Why doesn't the size of the render seem to follow the model on the screen?

This is a matter of **Resolution** settings. In case you want to render the exact camera boundary as seen in Revit, set the **Resolution** to **Crop Region**. In case you want to set a specific resolution, use either the **Preset** resolution values or the **Custom** ones.

21. How can I render an elevation view?

Set the V-Ray Current view to ortho 3D view. Open Revit’s ortho 3D view. Set the view cube to any of the elevations. **Enable Crop Region** and adjust its frame. Set the V-Ray **Resolution** to **Crop Region** and render.

22. Where is the Grass & Fur Tab, I cannot find it?

Starting with V-Ray Next, Update 1, Grass & Fur Tab is no longer available. Instead, you can use the fur geometry, which is created from within the Asset Editor. For more information, see[ Geometries (Fur)](https://docs-chaos.atlassian.net/wiki/spaces/VREVIT/pages/160727558).