No. Source uses VTF-format textures, and there doesn't seem to be a Blender plugin that imports VTFs into Blender. And if it could, Blender would have to find the VMT material files of the model (which are typically very far from the QC/DMX/SMD files), look for $BaseTexture in the VMTs, and load the VTFs specified by $BaseTexture (which are sometimes not even in the same directory as the VMTs). Even then, what about VMTs that use special options, like the Refract shader or completely overriding $BaseTexture with $Detail?

So no, even with a VTF import plugin, it's simply not possible to automatically do this with the Cycles renderer, Eevee renderer, nor "Blender" renderer, unless you're okay with Blender Source Tools looking through every single folder on your computer until it finds what it's looking for, making it possibly take hours to import a model.

There Is a way to import VTFs and VMTs in Blender with the help of a few surprisingly unheard of addon:
https://github.com/REDxEYE/io_texture_VTF

Where did you find that video? This is the first time I see such functionality, but if it exists, it can be done for Cycles, it just needs to link the textures differently so they work with Cycles.

It is otherwise theoretically possible to automatically import textures, like for example prompting the user to pick the game's root folder and then by parsing the QC and the model materials finding the proper textures, but that would be quite difficult to program and would be prone to issues. For now, feel free to try the addon above, it should make things a bit quicker than having to convert every single VTF before importing the texture into Blender.

引用自 Momo：

There Is a way to import VTFs and VMTs in Blender with the help of a few surprisingly unheard of addon: -Link- -

"Surprisingly unheard of" indeed. Actually searching for "Blender VTF plugin" or such simply shows results about "it's not worth making such a plugin, just use VTFEdit to convert it to PNG".

引用自 Momo：

Where did you find that video? This is the first time I see such functionality, but if it exists, it can be done for Cycles, it just needs to link the textures differently so they work with Cycles.

Sorry, no clue where the video is from.

引用自 Momo：

There Is a way to import VTFs and VMTs in Blender with the help of a few surprisingly unheard of addon:
https://github.com/REDxEYE/io_texture_VTF

That looks interesting.