Over March-May this year I got to grips with Leak Hammer and produced two maps, a take on the C17 Trainstation circa 2001 and an Inner City-inspired "Alien Brutalist City".
The 2001 trainstation comes in the form of a "mini-mappack" featuring three texture styles from Bun, Klow (pictured above) and the vanilla leak respectively. To install simply drag and drop the "hl2_smokey" folder into your anon-hl2 directory.
The Alien Brutalist City is a single map with a custom skybox by Sergeant Stacker. It can either be dropped into the hl2 folder or the aforementioned hl2_smokey folder.
You can download them here:2001 TRAINSTATION MINI-MAPPACKhttps://drive.google.com/file/d/1uMYi-oVKtueGZ6pQCjfxZqp3G0TRwK6QALIEN BRUTALIST CITYhttps://drive.google.com/file/d/1FGElg4H3eMsyhuJzvPz_79JBL-ReWhsm/I'm not interested in doing Leak Engine stuff anymore so don't expect further support. However I have bundled in all of the relevant assets including map sources so you are free to do what you want with them. Just remember to provide proper credit when available.