The list in the Revit tab displays all V-Ray-supported Revit families loaded into the current project, i.e. only those families which can be replaced with V-Ray geometries. Namely, the following Revit family categories: Casework, Entourage, Furniture, Furniture System, Generic Models, Planting, Site, and Specialty Equipment. In case of linked files, the families of the main Revit file are listed under the Project expandable group, whereas those of linked files are listed per file under separate expandable groups. Replacing a family only takes place at render time. Replacing a family can be done either via drag-n-drop from the Asset Editor or from within the V-Ray drop-down menu available next to each item in the list. The menu displays the three V-Ray replacement options. Replacing a family requires that the V-Ray replacement counterpart is created beforehand, otherwise, the drop-down menu does not display any available replacements. Proxy MeshTo replace a Revit family with a Proxy Mesh, you first need to create it in the Asset Editor and associate it with a .vrmesh file. This is a special file format which contains all geometric information of a mesh necessary to render it (such as vertices and face topology, texture channels, face material IDs, smoothing groups, normals, etc.). It is important to realize that: - the mesh is in a "ready to render" format in terms of geometric state, i.e. no further modifications to its geometry are possible;
- it does not include materials but material IDs corresponding to various parts of the geometry and this requires associating them with V-Ray materials.
|
The .vrmesh files can be exported from any platform having V-Ray installed as well as generated by converting other file formats with the command line conversion tool ply2vrmesh which installs along with V-Ray for Revit. It is recommended to use Proxy Mesh in cases where individual assets such as Planting and Entourage are being replaced. That said, the Proxy Mesh could be a tree, a piece of furniture, a car, etc. Proxy SceneTo replace a Revit family with a Proxy Mesh, you first need to create it in the Asset Editor and associate it with a .vrscene file. In addition to the geometry (and unlike the .vrmesh), that format also includes materials and lights. It allows for assets to be shared between all platforms that run V-Ray. It is recommended to use Proxy Scene in cases where a bigger or more specific amount of V-Ray work is being transferred such as a terrain, surrounding buildings, etc. When rendering interactively, any actions with Proxy Scene replacements are disabled by default. Stop the interactive rendering in order to make Proxy Scene replacements or modify existing ones. |
Cosmos ContentTo replace a Revit family with a Cosmos 3D model, you first need to import a model from the Cosmos Browser. All Cosmos 3D assets imported in the Revit model appear under the Cosmos subtab as well as under the Cosmos Content section of the V-Ray replacements drop-down menu. Similarly to Proxy Mesh and Proxy Scene, the replacement does not affect the model and is visible only at render time. Cosmos 3D models work as standard Revit families. They could be used as replacements in order to preserve the schematic look of the native Revit families across drafting views. Beware that Cosmos families that are used only as replacements (i.e. are not placed in the model), are removed when executing Revit's native purge command. |
When a Revit family is replaced with a V-Ray Proxy or a Cosmos asset and its instance is associated with a Scatter, the V-Ray Proxy/Cosmos asset is the one that is scattered across the Host object associated with the respective replacement. When a Revit family is replaced with a V-Ray Scene, the Scatter is ignored. |
|