That would make the copy/paste/move option exactly what is needed.
For the multiple wall layers it's important to know how walls are measured in Sweet Home 3D. In this case the wall thickness of each layer is important. The X and Y coordinates are the coordinates for the center of each end of the wall. This means that the left side of a 10cm vertical wall is at X-5 and the right side is at X+5. For a horizontal wall use the Y coordinates.
So if you have a wall 10 thick and paste a copy at the exact same position you move that copy 10 to align them side by side.
But if you paste a copy and change the thickness to 5 you have to move the wall (10÷2)+(5÷2)=7.5 to align them against each other (half of each wall). You can add 7.5 to both X coordinates for a vertical wall and both Y coordinates for a horizontal wall or use the Move function from the AdvancedEdit plugin. If you want a gap between the walls you add the gap width to the number you calculated.
For the multiple wall layers it's important to know how walls are measured in Sweet Home 3D. In this case the wall thickness of each layer is important. The X and Y coordinates are the coordinates for the center of each end of the wall. This means that the left side of a 10cm vertical wall is at X-5 and the right side is at X+5. For a horizontal wall use the Y coordinates.
So if you have a wall 10 thick and paste a copy at the exact same position you move that copy 10 to align them side by side.
But if you paste a copy and change the thickness to 5 you have to move the wall (10÷2)+(5÷2)=7.5 to align them against each other (half of each wall). You can add 7.5 to both X coordinates for a vertical wall and both Y coordinates for a horizontal wall or use the Move function from the AdvancedEdit plugin. If you want a gap between the walls you add the gap width to the number you calculated.
That sounds really complicated. Someone should invent something to do all that without all of those laborious manual calculations. A calcu... No! I've got it! A computer!!! /s
