Texlight
A texlight ("texture light") is a light generated by the map compiler in front of a surface with a given texture, making it appear as if the texture is emitting light. Older compilers, such as QRAD and VRAD create a single large texlight in front of the texture, adding a new texlight for every subdivision. Modern compilers, such as ericw-tools, can instead create several smaller texlights across the textured face, making it look more like the texture is actually casting light, instead of looking like it has a light placed right on top of it.
Confirm:What method does VHLT use?In 
Source, only RAD files can create texlights.
In 
GoldSrc, RAD files can be used, but they have been deprecated in ZHLT and VHLT by info_texlights and light_surface.
