Autodesk 12812-051462-9011 User Guide 3 - Page 1790

UVW Mapping on Revit Elements An important consideration in how many materials render is how they are "mapped" to the surfaces of the objects they are assigned to. This is especially important for materials that use bitmaps on page 7926 to define the diffuse color of a material, or the bump and cutout special effects. As an example, you may have scanned a picture of wood grain for use in a material, but when the material is applied to an object, how large should the image of the wood grain be? Which way do you want the grain to run, and how do you want the grain to wrap around the corners of a three-dimensional object? How two-dimensional maps are applied to three-dimensional surfaces is represented by mapping coordinates on page 8034, which are stored as UVW coordinates on page 8161. Revit assigns UVW coordinates to object components, so in cases where mapping coordinates are important to the rendered appearance of an object, 3ds Max translates these coordinates and stores them in the object mesh that is displayed and rendered in the 3ds Max scene. Using Revit Materials on 3ds Max Geometry After you've linked a DWG file that has been exported from Revit, you may find that some of the materials that were created in Revit could be used on new geometry you're adding while working on the model in 3ds Max. Reusing a material is often easier than creating a brand new one. For example, let's say a wall element in the Revit project has a brick material that you'd like to use on an object you added to the model while working in 3ds Max. If you simply apply the material to the new object, you'll find that the texture map does not show as it does on the wall that came from Revit. This is because UVW coordinates of the new object are not set up to coordinate with the Tiling parameters of the Revit material. When using Revit materials with objects created in 3ds Max, there are really two things to keep in mind; ■ All materials from Revit use real-world scaling. ■ Real-world scaling must be active for objects you've created in 3ds Max. File Link | 7045