Hi nüke,
I slightly modified the source code of the gamemode to add a feature to it. As it is declared in the subject of the discussion it is the possibility to change dynamically the refraction amount of the stalker in order to make it more or less visible. I found that in certain maps this is necessary because the light is too strong and the stalker becomes completely unnoticeable.
Basically I created a cvar modifiable only by the server and settable during the creation of the server that modifies the default refract amount of the stalker model.
I attach a link to a screenshot I made so you can see the result with very high refract amount.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=289930653

If you are interested friend me so I can pass you the source code in private and if you are not I'd like to ask you the permission to publish a parallel addon in order to play with my friends with this new feature because now I have to pass the complete archive to them in order to play.

Let me know!
--
frankaroo

PS: Thank you for the awesome gamemode!