Hello everyone, I'm trying to create some additional 3D models by importing WRL files or OBJ/MTL files using the menu **File** > **New** > **3D Model...** The import process does work and I can see the models in the **Library** > **Work Space** but the rendering is either plain gray or black and does not look like the original model. I've imported other **WRL** files (from the KiCAD repository) without conversion with success. The files that give troubles are **STP** files (from the GrabCAD website) that I convert to **WRL** or **OBJ/MTL** files using **FreeCAD 0.19**. These converted WRL files are correctly rendered in an online VRML viewer. Do you have any idea what's wrong? Thanks, Original 3D Model in FreeCAD:  Same model imported using the **OBJ/MTL** format:  Same model imported using the WRL format: