Strange Ledge Bug in a TAS

[NightmareZer0]

I was trying out the DB series and decided to go play the very first one. I kept running low on ammo playing it casually so I thought I might see what I could do frame by frame and make a TAS. I like making no damage TASes and I was able to save a whole shell box but towards the end of the level I got this strange bug I have never seen before. A Hell Knight was floating in mid air. I am no programmer so I could only make guesses why this happened. I wanted to post the demo and see if anyone could tell me why (I am actually really curious I can't seem to recall this bug ever popping up in my game before). Maybe it was because I was playing the game frame by frame?  I also want to note I have a part of the demo where I stop moving. I guess I forgot to fully rewind in between takes (oops).

 

Complevel is 9 (Boom). I included the DB_01.wad in the ZIP for convenience purposes.

 

bug.zip

[Shepardus]

You pushed the hell knight there with one of your SSG blasts. I think it's just barely hanging on the ledge, it just appears to be floating because the feet in its sprites are smaller than the bounding box used for collision (it'd be nice if we could see the bounding boxes in the automap with IDDT).

 

By the way, DBP01 is a -complevel 2 WAD, and in cl2 (living) monsters don't get pushed off ledges like that.

[NightmareZer0]

8 hours ago, Shepardus said:

You pushed the hell knight there with one of your SSG blasts. I think it's just barely hanging on the ledge, it just appears to be floating because the feet in its sprites are smaller than the bounding box used for collision (it'd be nice if we could see the bounding boxes in the automap with IDDT).

 

By the way, DBP01 is a -complevel 2 WAD, and in cl2 (living) monsters don't get pushed off ledges like that.

 

Oh well damn. I wasn't sure what complevel to use I basically was just messing around. I didn't even think of the complevels being a factor. I mainly wanted to post it as well in case by some rare chance I found some extremely rare bug that might be useful to someone out there for something. I had been playing limit removing maps and I guess I forgot to change the complevel. I didn't even know about the collision box sizes.