bool __stdcall DrawShadow(shadowstruct* shadowobj)

Draw the final SW shadow object. Normally you use it with SWShadowBuildFromObj(..). But you can use it like a standard object. So you can draw it to same object at different palces. Therefore it will be rendered in world space.

sahdowobj: Your SW shadow object.
shadowmap: The shadow map of shadowed object, that you made with RenderShadowToTexture().

Result:
bool: