== angular perspective==
- In the representation using angular perspective, i.e. the object seen from the corner, there are two main points of view, and they are on the horizon line HL.
With this kind of representation sometimes it might happen that the points of view are very far one from the other and the lines coverging toward them, are longer than sheet on which you are drawing. In this case we'd better fix our sheet on a bigger one and extend the horizon line HL.
- see at artekjara.com