Hi, i already did:
https://forums.unrealengine.com/unreal-engine/feedback-for-epic/1695032-material-editor
Why it is valuable for me?: I combine a post process scanner with screen pixelation.
For a post process scanner you have to use the absolute world position per pixel and do some calculations. For a pixelated screen you have to divide the screen into grid cells. Within a grid cell all values shall be the same, for example the value of the middle of that cell. To achieve that you have to “snap” the UV for any values, also absolute world position.