TomVDJ wrote on 2021-01-16, 08:59:
Someone suggested there I should also ask the question here in the DosBox ECE thread.
This isn't an ECE specific question.
The sharp shader works perfectly for me. Basically, you are telling it to scale 320x200 to 1280x1000. Sharp does this by integer scaling 320x4 and 200x5.
In my config for ECE r4391, I have it set to opengl, fullresolution=1600x1200, aspect=true, scaler=none, shader=sharp, machine=vgaonly.
My monitor is 1920x1200, and this results in a perfect 4:3 1600x1200 image when playing Eye Of The Beholder in both VGA and EGA modes. I don't have Lemmings, so I can't try that for you.
You should try a different game. Try EOTB if you have it. I would also try a different version of DOSBox, one of the SVN builds.
And if you want to know how I can tell that EOTB is correct, it's got a lot of small text, so it's very obvious when the height is unevenly scaled. I've been using EOTB to test scaling in DOSBox for years and I know every pixel.