Engine with support for modern formats?

[mmx]

Having to deal with palette conversions, transparency, then having to use editor to replace the original sprites by hand, etc. etc. That kind of destroys the fun in modding for me. Is there any engine that supports modern formats, like PNG, and just takes stuff from the filesystem?

[Aquila Chrysaetos]

ZDoom and Eternity Engine, unless I'm mistaken.

[Gez]

https://doomwiki.org/wiki/PNG

 

As for sprites from the filesystem -- sure, ZDoom can load a directory as if it were a zip, but keep in mind that you can drag-and-drop a bunch of file from your file explorer/manager into SLADE 3 to automatically add them to an open WAD file.

[mmx]

Is there any documentation on how to replace the built-in weapons or monsters with custom PNG from a folder, for example? Or a sample basegame?