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Why is is that in GL mode this texture is aligned properly (right), but in software mode it is not (left), and how can I fix this so it works correcty in both modes?



The texture is 32x128, and is spread over a line 46 units long, with a vertice in the middle, so that I can align the texture properly to fit this distance, the right half of the texture has alignment -19. (both lines highlighted in red)

Do you use the stable version of GZDoom or a SVN? Or even Skulltag? This problem looks really odd and it seems to be a bug with the code...

Impossible to tell without the map.

Could it be some of the same things we'v seen in gl render which sometimes can be edited manully?
Try moving some vertices around in the given area that wouldn't be in the players view, and then run a GL build on it again.
Sometimes this works, depending on the sourceport or gl node builder.

I actually sometimes suffer a similar problem when I use negative offsets in the software renderer.

I guess one thing you can try is scrolling the right section in the other direction until it matches what it was before. This should eliminate the negative value without visual changes. (Unless of course it fixes the issue for Software )