particle edit grass

[antonvdh]

How can I make the grass shorter arround the edges in the blue square opening.

[Photox (Tim Gregory)]

Here are 3 ways to do it:

1. Using a greyscale image to control length
2. Using a vertex group (weight painting to control length)
3. Using the length brush in particle edit

1)Using a greyscale image to control length

2. Using a vertex group (weight painting to control length)
   
   
   
   

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3. Using the length brush in particle edit
   
   
   
   

[antonvdh]

Thanks for the very cool explanation.
I forgot to make another vertex group for the length.