When using a surface, I would suggest you to always double check it's local coordinates (your surface coordinates should correspond with intended Forest object orientation). For example a plane created in Front view will work differently with Forest objects as another one created in Perspective / Top view. Generally, when using surface(s), it's handy to apply the Reset XForm
utility on it to "reset" it's local coordinates as any "scaled surface(s)" Forest will inherit this scale (and that's not always desirable).
As mentioned above, applying the Reset XForm
utility over that surface to reset its local coordinates & scale should fix it. To rebuild the Forest object, use the the Update surfaces data
button or feel free to mark the Auto
check-box (to Update surface data automatically
- this may add a performance hit for complex surfaces).
If the problem persist, please feel free to send us
your scene to analyse it here.