CoDRadiant: What is .prt file and what to do with it?
Title says it all:
I have managed to create a skybox with worldspawn settings and besides creating a .bsp file, I have also created a .prt file, which happened to me for the first time.
I assume it is important file regarding skybox, worldspawn and so on, but I would like to make sure, what is it good for and how to "activate" it.
Thanks in advance!