HDR, launch option questions

Just downloaded Black Mesa on Steam, got a couple questions.

Under the ‘High Dynamic Range’ option, what’s the difference between ‘Full’ and ‘Expanded’? Or which gives better image quality?

And do launch options like -threads or -high work for Black Mesa?

Thanks.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.