Can't save PDF in P3D sketches!!!!

Unfortunately it has proven rather impossible to create a high resolution PDF from the P3D sketch function that I have been using. This means I will have to use P2D instead of P3D, which will result in images that do not have the depth and complexity as before. However, the P2D images still manage to explore my concept very well. After Loads of experimentation I have begun to shape my four wallpapers into a series that all explore line weight, depth, contrast and space arrangement.