Hi Philywebrider, here's what I did to get my different glass materials in the appropriate preview group (i.e., glasses): 1) Open the Vue application folder / Materials. 2) Open the preview group folder you want your downloaded materials to appear in. For our example, open "Glasses". 3) Rename the file "material.prv" to something different like "material.bak", or delete the file. 4) All the materials that ship with Vue start with a number and an underscore to define the order in what they'll appear in the materials browser. Copy your dowloaded material into the folder, and rename the material accordingly. For our example, copy your glass material into the glasses folder, and rename it to 30_Yet another glass.mat. (There's 29 glass materials in said folder, hence the 30_ .) 5) Start Vue, and browse to the materials group you added the downloaded .mat to. In our case, that's "Glasses". Vue will automatically generate a new material.prv including your freshly added materials. To change the preview texts (i.e. Title and Description), open the material in Vue's material editor and hit the Save button. Enter a suitable title and Description, and save it at it's desired location (i.e. materials group folder) with the appropriate name (i.e. [number]_[filename].mat). To add a new folder in the materials browser, just create the folder e.g. in the Materials directory, open Vue, go to the materials browser, and hit "New". Browse to your new folder (say, "downloads"), select a material in said folder, and hit OK. Enter the name you want the folder to appear with in the materials browser (e.g. "Downloaded Materials"), and you're done. In this case, you won't need to number the materials unless you want to predefine the order in what the materials will be listed. Hope this helps, -Sascha.rb