How To Draw Shadows On Elevations Autocad

How to Generate Shadow lines in AutoCAD with Shadow Multi Cast

This tutorial will show you how to generate shadow lines using Shadow Multi Cast for AutoCAD FULL users.
NOTE: North must always be facing up the screen to generate shadows correctly. The first steps show you how to do this.

Setting North Point

Open Tutorial-1.dwg from the Shadow Multi Cast folder c:/Program Files/Shadow Multi Cast/
First thing is to save the current AutoCAD UCS. Doing this makes it easier to rotate the screen as you will see later. Goto Shadow Multi Cast menu, highlight over Rotate Screen, Goto Save UCS and left click on Original. Your current UCS is now saved.
Next we need to change the screen rotation in AutoCAD to have the north point facing Up the screen. Goto Shadow Multi Cast menu, highlight over Rotate Screen, then left Click Free UCS. You will be prompted to pick a point, pick the bottom point of the North Arrow in the Tutorial-1 drawing.
Now Left Click on the top of the arrow.
Your screen should now have the North Arrow facing towards the right of the screen. To make the North Point face up the page, goto the Shadow Multi Cast menu, highlight Rotate Screen then left click 90 Counter-Clockwise.
The screen will now rotate and the North Point will be facing up the screen.
Now we want to save the UCS again but this time as NEW. Goto Shadow Multi Cast menu, highlight Rotate Screen, highlight Save UCS then left Click New UCS. To switch between Original and New UCS, use the Restore UCS menu under the Rotate Screen option.

Generating Shadow Lines

Adjusting layers and drawing in Shadow lines

Controlling Viewport Layers

The Load Viewport State in the Shadow Multi Cast menu is to assist in setting up shadow diagrams in paper space. Make sure you are in Paperspace, setup 2 viewport(s) if you haven't already.
First thing you need to so is turn on all the shadow lines for all the layers. In this example, goto the Shadow Multi Cast menu, Show shadows for..., then click on September 22nd, then Left Click Show All Sept
All the layers are now on in Model Space and can be seen in Paper Space as shown in diagram. All those shadow lines are messy, lets fix it up in the next step.
Double click in the left viewport. Once inside the viewport, goto Shadow Multi Cast menu, scroll down to Load Viewport State, then Select September 22nd, then Click on 9am. All the layers except for Sept9am are frozen in the viewport. All the layers are still on in Model Space but are frozen in Paper Space.
Double click in the Right Viewport. Again, goto the Shadow Multi Cast menu, highlight Load Viewport State, then Select September 22nd, then Click 3pm. Your drawing should now look like the image to the right.