The ZDoom homepage was updated with the following:
Did I mention I had been struck by feature creep? I just added mirrors to ZDoom. I'm also considering adding sky boxes, since they are functionally very similar to mirrors. Maybe I will be able to stop myself and actually finish what I originally had planned for 1.23 so that I can release it...Decals? Mirrors? Skyboxes? Am I the only one who hasn't heard of any of this stuff going to be in ZDoom before?
I've also sped up the drawing of floors and ceilings and made them more accurate. (e.g. Blinking lights no longer "shake" sectors.)
As for the decals I hinted at on the first of the month, there are two types: automatically generated ones and decals placed by the level author. Automatic decals include bullet holes, scorch marks from explosions, and blood splats. (At present, I only have the bullet hole graphics done, so those are the only automatic decals that are actually implemented yet.)