On the Duke4 forums Interceptor CEO Frederik Schreiber has revealed never before seen assets created during the creation of Duke Nukem 3D and Shadow Warrior.
The newly revealed images come about following Interceptor's purchase of 3D Realms earlier this year. The first gallery below features the Duke Nukem 3D and 3D Realms assets while the second has the Shadow Warrior images.
Schreiber added that more 3D Realms assets might be revealed in future:
"We can share material from anything 3DR, except Prey and Duke Nukem Forever, as those specific titles are owned by Bethesda and Gearbox Software."
But said that as of yet, they haven't found anything worth posting from Duke 1 and 2, Death Rally, or Whacky Wheels.
"We haven't stumbled upon any yet, but I'll definitely keep you posted If we find any!"
There's more on the forums about both games and 3D Realms in general which is currently teasing Mass Destruction without Duke Nukem and is in the middle of legal proceedings against Gearbox who claim 3D Realms and Interceptor are illegally using the Duke IP.