The only difference bettween test271.wad and test271_2.wad is: test271_2 does not have hires analogue for SCOMP1.
test271.wad in zdoom:
http://prboom-plus.sf.net/Screenshot_Do ... 163224.png
Both wads look correctly with gzdoom/prboom-plus/glboom-plus
http://prboom-plus.sf.net/Screenshot_Do ... 163235.png
