Here's a glitch I accidentally discovered awhile ago while screwing around with the barnacles in Half-Life 2.
I came across this bug by complete accident, I thought it was purely visual at first... until I walked into it.
Ditto, but on foot and in combat (ignore the broken blood particles).
Here's what a Half-Life 2: Episode Two map would look like with cascaded shadow mapping possible via Chaos engine, a fork of the CS:GO branch of Source.
Playing around with Panorama in a hobbyist project of mine via Chaos engine, a fork of the CS:GO branch of Source.