Is there a tutorial how to render Source Engine models with HDRI to let them look like this?
https://modetwo.net/users/nachimir/vga/media/halflife-phot-002.jpg
Thanks for help!
Yes there is.
Could you give me a link, please?
My efforts to search for it failed.
https://developer.valvesoftware.com/wiki/HDR
https://developer.valvesoftware.com/wiki/HDR_Lighting_Basics
https://developer.valvesoftware.com/wiki/Advanced_HDR
https://developer.valvesoftware.com/wiki/HDR_Lighting_Settings
https://developer.valvesoftware.com/wiki/HDR_Skybox_Creation
https://developer.valvesoftware.com/wiki/Env_tonemap_controller
I am not talking about how to use HDR in Source Games.
I am talking about rendering model screens with HDRI software like HDRShop to let them look like in the picture above.
Edit:
I found this thread, but the link to the tutorial is dead.
https://www.facepunch.com/showthread.php?t=21286&pp=40
In that case I think that it’s easier than you think.
HDRshop modifies existing images. Just make a render/screenie, import the image, and voila.
Thx!
But as long as nobody can give me a link to a guide, this doesn’t help me that much. 
HDRshop has tutorials.
maybe the best way to do such renders is decompiling the model and render it with HDRI in a raytracing renderengine
I have it now!
archive.org was the solution.
I ever forget about this service…
Thanks for the replies!
Sounds complicated.
not really. Sounds more complicated than it is.
use this
https://developer.valvesoftware.com/wiki/Mdldecompiler
to turn the source models into regular models, then open them in your model program of choice and render them with HDR enabled.