Use 
		Flip Tube Direction to switch the direction of the current brush between 
		Along Path (often best for canvas painting of plants) and 
		Along Normal (often best for scene painting of plants). The difference between the two tube directions varies according to brush type and settings, so experimentation is worthwhile.
	 

Simple Tree Brush Painting Along Path in a Scene
 

Simple Tree Brush Painting Along Normal in a Scene
 
To flip the tube direction
- Do one of the following: 
		  
- On the 
				Paint Effects panel toolbar, click the 
				Flip Tube Direction button 
				 . .
- In the 
				Modeling menu set, select 
				. 
			 
 
Note: The 
		Canvas section of the 
		Paint Effects Globals window () has a 
		Force Tube Direction to be Along Path checkbox. If selected, it causes brushes with tubes whose elevationMin is greater than 0.5 to be drawn along the path rather than along the normal in 
		Canvas mode. This has the effect of making plant brushes draw in the expected direction when painting in the canvas.