This is not yet merged to master branch, PR can be found here:
https://github.com/Ryujinx/Ryujinx/pull/1365
Some screens with improved IQ:
https://github.com/Ryujinx/Ryujinx/pull/1365
This PR introduces a feature and configuration option that lets you scale compatible render targets in a game using a single multiplier value, which you can set via a combo list from 1x to 4x... or if you're feeling brave, any floating point number.
The goal is to scale shadows and screen-bound render targets using the scaling factor.
You can change this value while emulation is running to get a feel for how it affects game graphics and performance. The changes are applied instantly, so have fun with it.
Some screens with improved IQ: