Hiding Ceiling Brightness

[Qent]

You can't look down in Chocolate Doom.

[Llewellyn]

You can't look down in Chocolate Doom.

I was talking about IJON's post.

Anyway, the slimetrail DOES NOT BREAK in Doom2.exe
Prooves:

[fdigl]

I'll have to try this one out...
Anyways, I'd agree with what the others are saying about OpenGL breaking this trick. It doesn't sound like it would work in that case. If all is wrong, UDMF is your friend... and Google.

[esselfortium]

ZDoom in Doom format supports Boom's lighting transfer specials. There's no need to use this trick unless you're mapping for vanilla Doom. Also, flat bleeding and slime trails are two completely different and unrelated phenomena. Flat bleeding is the trick used in this thread, slime trails are a bug caused by inaccurate nodes, generally relating to off-grid vertex positions or odd-angled lines.