The SNES supported interlaced video modes, but Super Mario World did not use them. Early consoles achieved progressive scan by sending all the fields at the sam

The SNES supported interlaced video modes, but Super Mario World did not use them. Early consoles achieved progressive scan by sending all the fields at the same polarity (eg. only odd field or only even fields), violating the NTSC standard. This is the reason why they had obvious scanlines on CRTs. Because this is a non-standard mode some modern TVs and capture cards will fail to support it and show interlacing artifacts, but this is not how it looked originally.