The open source Zircon engine ("DarkPlaces Mark V Project") is a modification DarkPlaces engine with a mouse driven menu everywhere, ALT-ENTER fullscreen/windowed switching and 88 other enhancements to support user/mapper/mod coder ease-of-use and optional conveniences for those interested in a "1996 Quake" experience. "csqc_full_width_height 1" in console when running Arcane Dimensions at this time It is hoped that some/many/all of these enhancements will eventually make it into official DarkPlaces. The Zircon engine seeks to keep full compatibility with DarkPlaces so either engine can be used interchangeably.
AD Sepulcher loads for Arcane Dimensions. 32-bit TGA files are considered to always have an alpha channel, DarkPlaces often would be the sole Quake engine that did not recognize transparency in some TGA files --- there are many popular image editors that write TGA files slightly differently and some write alpha TGAs in a way DarkPlaces does not handle. Heavily reduced "developer 1" spam of key has "no translation" on Windows.
You made an update here? Nice! I downloaded - keep up the good work :) I just chanced upon your page while browsing here ^_^
-Gem