I’m having trouble understanding the relationship between image textures and the UV maps. This is just a box and a random image I have around to illustrate my point.
If I change the scale of the image via the mapping note, why doesn’t the image get bigger and the UV map get smaller? Visually the image is scaled up on the object but it then doesn’t look like it has any relationship to the UV map on the left.
The mapping node will scale the image after the uv map, if you scale the mapping with nodes it will not effect the UV reference image or the map itself.
In the uv editor you can see the lines that represent the edges of your cube. Your texture will map according to those lines, the scale of the mapping node is applied afterwards.
The most graphic way to scale your texture is to scale the UV’s in the UV editor, not with the mapping node.