I'm basically trying to trace the isometric view of a technical drawing in inkscape. I do know, that joining nodes on different paths is only possible, when the two nodes in question are the end nodes of the respective paths and the two paths are combined into one. I need to make T-crossings of more than one line segment, which form a perfect outer angle. Is this somehow possible?
In this picture, the upper right corner of the triangle forms a perfect angle with the two adjacent lines. The lower left corner, where an extra line segment is added doesn't.