3d cutaway plans are ideal for visualising relationships between the plan and vertical or three dimensional objects such as windows or stairs

3d cutaway plans are ideal for visualising relationships between the plan and vertical or three dimensional objects such as windows or stairs

shows flat projection of elements to accurately depict heights and relationships of elements  

simple line based perspectives can be created to show real geometry eye level views to demonstrate concepts such extent of visibility from a street, or simply the scale of a proposed element in the foreground. this image demonstrates both concepts