HammUEr, a Hammer/Worldcraft map importer for Unreal Engine

All the basic game textures and materials (you’ll have to replace for your own game anyway) you need for map creation are in the vpks these days.
Anyway, here’s a few unlit shots of the L4D SDK’s style guide maps.
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I’ll also be waiting to release a public 4.13 build until we’ve gotten further than a first preview.