: Install the Blender Source Tools plugin. Use it to import the .smd files into Blender.
You need a tool capable of reading the Source Engine's proprietary model system. vtx to fbx
If you are working with game assets (Source Engine), a VTX file cannot be converted in isolation because it is part of a "model set" including .mdl , .vvd , and .phy files. Step 1: Decompile the Model : Install the Blender Source Tools plugin