[since 2.4.0] BOOM Transfer Sky Texture, Tall Sky Bug

[Hellser]

I'm creating a map for BOOM and due to the nature of how we got the maps set up, we have to use "Transfer Sky Texture to Tagged Sectors" action (271 and 272). I dislike how ZDoom was handling the stretched sky so I 'borrowed' the sky textures from Skulltag to make a quick sky replacement for Doom. Was looking good until I looked all the way up.

How it's seen with Boom's 271/272 Linedef
How it's supposed to be

Note the cut off at the top? Is this a bug with ZDoom that can be fixed? Also, don't worry about the sky being flipped in the first screenshot.

Attached here is a sample wad to be used with ZDoom. The switch at the end takes you to the next level (MAP02) which doesn't have the transfer sky texture action.

[Graf Zahl]

How old is the correct screenshot? And what engine version?

[Hellser]

The correct screenshot is from MAP02 (without Boom's Transfer Sky Texture). The version I've used to test this with is 2.9pre-985-gd43ea33. The screenshots were taken from a build back in February the 15th, I think. But the issue continues with the current build I've got off of DRDTeam. Though it seems there is a 1-pixel line now where the sky repeats at the top (with the current build, that is).

Edit: Further testing: 2.8.1 has this issue... 2.8.0, 2.7.1, 2.6.1... if I go any further down, I might have to convert the PK3 into a .WAD.

Edit: Further testing, this bug was introduced between 2.3.1 (correct) and 2.4.0 (bugged).