/vr/ - Retro Games

Being complete serious here btw:

The perfect filter will be a multi pass with several stages.

The goal here I'm assuming is to get a filter that produces higher resolution sprites without any noticeable detail distortion.

This is difficult with existing HQx4, supersai etc. as the edge distortion creates all this ugly vector art crap that detracts away from the "intended" level of detail

In my experience a nice biliniar filter can double or even triple the resolution by creating extra pixels and this, to me is ideal and produces a similar effect to scan lines.

So in conclusion

First pass: create more pixels to work with using a bilinear filter

Second pass:If you have read this far I applaud you but I got nothing. Perhaps something that can calculate larger curves based on an alogarithm so groups of color are more natural.

Third stage: Smooth out the newly created detail with a Hq4x whatever filter that dont let the lines go in weird directions or create odd edges.