Related:<p>Level Editing - Duke Nukem - ADG Mod 12 [0]. It has expanded info about the tile sets, how items in tiles inherit the background from neighboring tiles, mod editor (from the 1990s, still in use today), etc. Interestingly enough, there is no background tile layer!<p>[0] <a href="https://youtu.be/Pd6WoL-G_48" rel="nofollow">https://youtu.be/Pd6WoL-G_48</a>