Achieving the best picture using Bettle PSX at 240p

[alphanu]

By the way, using the dynamic calculator shows a 1024 width for a original 256 width (multiplying by four). But you can use 2560 instead and multiply the original 256 by 10. Both should look the same. So, what difference does dynamic make?

DYNAMIC will switch on the horizontal resolution. Many consoles did this on the original hardware. SNES, PSX, SATURN, GENISIS, N64 and so on all do this mid game. Even some arcade hardware did this. When your using a static super resolution the width is locked at that resolution, it does not change. This means that you are not getting the true video output. The video will be the wrong aspect, wrong boarders, wrong scale and if its not an exact multiple you'll get artefacts. 

The lower the super resolution is, the closer you get to real looking hardware. It is mainly designed to give the look and feel of native resolution swiyching but for hardware that can not handle it. Like Intel and NVIDIA.

I personally use NATIVE as I have a AIT GPU.

Here is a video showcasing it.  https://www.youtube.com/watch?v=Xn6DBimQmL8