Set up your SMD/DMX models with Blender Source tools an export them all. Set the parameters of your QC to generate, you can choose a model to be your collision model if desired, and then click Write ...

Here's a quick guide on creating a rock in Blender. How to export an obj file and import an obj file into Blender 2.8 Thanks ...

First of all, extract all the necessary game specific contents. Make sure to have the exact same folder structure as they have originally. Images can be found inside the .iwd files. The rest of the ...