0
$\begingroup$

I'm populating a hillside with grass and would like the grass to grow straight up from their origins and not along the hill's normals.enter image description here

$\endgroup$
2
$\begingroup$

I don't think that perfectly vertical grow would seem "natural", but if you need that, you can set Z axis velocity, using advanced settings:

enter image description here

Otherwise, you could also use "particle edit" mode to "comb" your grass as you wish:

enter image description here

then you comb "hair"

enter image description here

to get this, for example:

enter image description here

If you manually edit particles, your particle system gets some what locked, after. You can always revert those edit, use the "free edit" button on the particle settings, then.

Finally, and otherwise, you could use "a curve guide": https://docs.blender.org/manual/en/dev/physics/force_fields/types/curve_guide.html

That needs another bezier object with force field "curve guide" set, and then activate a force field effect of the same type on your hair object. Like this:

enter image description here

Remember, you could also use more than one particle systems, so to get some variation, and each can be using different methods and settings...

$\endgroup$
  • $\begingroup$ Wow, three different methods and illustrated too. Thanks so much, m.ardito. That was very generous of you. $\endgroup$ – Michael Natale Apr 14 '17 at 15:13
  • $\begingroup$ FYI, you can also add a bit of brownian effect to break the regularity (you can find it under the newtonian physics part). $\endgroup$ – lemon Apr 14 '17 at 16:08

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.