Just downloaded version 1.4 of Amibian to find out that the built in 50Hz option for LCD-screens uses point-filtering and the terrible resolution of 800x600, making all pixles wobble in motion. I know some people like pixel perfect point-filtering, but to me pixels must be either integer scaled or linear filtered in order to look good. What do I do?
linear-filtering in 50Hz mode
the option scaling_kernel in the config file sets the filtering. Use 'scaling_kernel=7' for a super-soft filter that even blur out raster pattern somewhat. To me it seemed more authentic and how I remembered my Amiga 1200 AGA-graphics on a CRT-TV. :) if you don't like it experiment with other modes.
For a soft CRT-like image on a modern 1080p screen, use these settings:
hdmi_cvt=1920 1080 50 3
Point-filtering with integer scale in 50Hz mode.
If you are going for point-filtered image (scaling_kernel=8), and are lucky enough to own a 1280x1024 screen at home (that can output 50Hz). You will be able to get a perfect 4x scale of 256p. (You must also set UAE's display setting to 640x256)
hdmi_cvt=1280 x 1024 50 4