How can I get the best possible quality outcome for my instagram filters?

Hi everyone,

I am working with Spark AR since a while already but somehow I feel like the quality of my filters is not very good. Sometimes it seems a little washed out or the outlines seem pixelated. I guess this can also depend on the device but still there must be a trick? I try filters sometimes from other people that look so much more clear than mine?

Thank you!