Spirit of Half-Life (SoHL) is a modified game engine for Half-Life 1 modders that includes many new things not seen in the original Half-Life engine by Valve. This includes reflections, mirrors better lighting, weather like moving clouds, rain, snow, and fog. Physics capabilities like picking up objects and dropping them, or when some thing explodes objects go flying off in the direction.
SoHL v1.5 with no Source Code is highly recommended because of its stability and numerous features.
Can someone explain why the 3D skybox feature no longer works?
If there's anyone out there willing to bug fix this version, and add nothing more to it, i'd be very grateful.
This is probably some kind of trick about how exactly to texture sky brushes.