Increasing quality will come at the price of decreasing productivity.
Modder ScoutBr0 improved the quality of ray tracing-based reflections and shading in The Witcher 3. Initially, the game used a simplified version of the world to calculate RT shadows and reflections, ScoutBr0 fixed this.
The first modification improves the quality of reflections and shadows in the game world. This is especially noticeable on water: before the reflections did not look exactly like the objects they were supposed to reflect, now everything is fine.
Shadows, also calculated using simplified models, have become more reliable: for example, now you can see how the sun shines through a hole in the roof of a barn.
It was and became
The second modification is intended to improve the quality of interior reflections. The reflections, the modder notes, cannot be called ideal, but it is still better than it was.
The modder estimates that using the mod for reflections in the open world can result in a loss of approximately 18% of the frame rate. The impact of the second mod on performance is not reported.
This is interesting