It's near the end of the semester for most of my students and final Revit project designs will be due shortly. Because renderings are an important requirement of these final projects, everyone is asking where to find good materials. The most important aspect of creating materials in Revit Architecture is to find "tileable or seamless" materials. When materials are created and applied to a 3D model, the software takes a texture map (an image of a material), usually a few inches in size, and repeats the pattern across the entire model. The best texture maps make it hard to tell where exactly the pattern begins to repeat.
To find these "texture maps", be sure to include "tileable or seamless" in your Google search along with the type of material you seek. It's also helpful to include the word "FREE" in our search (i.e. "free tileable concrete pavers"). When conducting a Google search, choose the IMAGES tab to review the textures available. Under TOOLS button, choose MEDIUM or LARGE based on the quality you are after (see image below). Just remember, the larger the image, the larger your Revit file will become! Once a large image is found, right-click and choose SAVE IMAGE AS ... You are seeking JPG or PNG files to download from the internet.
Here are a few helpful sites:
For more professional materials, I would recommend Arroway Textures, by far one of the best texture site online. This site is well worth the investment if photorealistic renderings are important to your projects.
John Manfredy has over two decades of expertise teaching architectural technology to architects and interior designers. Coursework has included Autodesk products: Revit Architecture, 3D Studio Max, Autocad and SketchUp.