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Each type of path is meant to be used by a different type of actor (Rigged – 4D walking) to create a different density of people (low – high) for a different type of camera shot (short – long). So, depending on your needs, you should decide if you need to use one or the other before you start drawing it because both types of paths are fundamentally incompatible with each other and it is not possible to convert them after they are created.

We recommend using 4D Paths to create actors that will be seen from a short-mid distance from the camera to take advantage of the amazing realism that the new 4D Digital Humans have made possible. The downside of using them is that they take a lot more resources than the Rigged actors. That is the reason why we force the user to place each one of them manually, to prevent potential problems that can be caused by a massive usage of them (poor real-time playback performance, high use of disk space and RAM, etc.).

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1. Add those stairs to your geometry background.
   
   
   
   
2. Select the Crowd Path tool and draw a new path over the stairs. To get better results, we highly recommend creating a path point at the top and bottom of each staircase.
   
   
   
   
3. Go to the Node Properties panel and change the Stair Direction Rules if necessary. These determine which side of the walkway actors will use depending on if they are ascending or descending. Options are Left Down/Right Up, Right Down/ Left Up, or No Rules in which case actors will use any side irrespective of their direction.
4. Click Generate to create the actors.

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CREATE PATHS ON A SLOPE OR UNEVEN TERRAIN

1. Add a geometry background that includes uneven terrain or ramps.
2. To create characters on ramps of uneven terrain you would use exactly the same procedure to draw a path over them and start selecting the Crowd Path tool.
3. Then click on the 3d viewport to define the starting point of the path and keep clicking to add additional points.
4. For complex terrains, you may find that adding additional points might give you a more accurate projection of the walkway onto the surface.
   
   
   
   
5. Right-click / ESC to finish the drawing.

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