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I have 2 planes: 1 with Displace modifier (so random hills and valleys according to a cloud texture) and another flat of different size. My question is if it is possible to deform the flat plane according to the first plane.

Depending on where I place the second plane regarding the first plane it'll take exactly the same shape the first one has at the position where I place it. Think of the second plane like a piece of cloth that when I put it on top of a rough surface, depending on where in the other surface, it would deform and take the shape of the irregularities it is placed on.

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  • $\begingroup$ Either Lattice modifier added to the second plane together with Shrinkwrap modifier so Shrinkwrap will stick the lattice to the plane, and second plane will follow lattice or add a Cloth modifier on second plane and run animation. Note - all possible solutions here most likely will depend on the geometry (should be pretty high). $\endgroup$ – Mr Zak Feb 20 '17 at 12:33
  • $\begingroup$ Related - blender.stackexchange.com/questions/44758/… $\endgroup$ – Mr Zak Feb 20 '17 at 12:37
  • $\begingroup$ Thanks for the reply and edit. I followed the lattice on the given link, but the 2nd plane just got stick to the first without deformation. I tried to change lattice U, V, and it got even weirder shape. Maybe the geometry is not high enough? $\endgroup$ – AugLe Feb 20 '17 at 13:28
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    $\begingroup$ Probably, not enough geometry might cause that, though It's hard to tell without screenshots. $\endgroup$ – Mr Zak Feb 20 '17 at 13:38
  • $\begingroup$ I think in this case, the lattice is not needed and may keep the plane flat. Try to shrinkwrap directly without lattice (but with enough geometry for the plane) $\endgroup$ – lemon Feb 20 '17 at 14:54
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If the base terrain plane is deformed by a displace modifier why not just give the second plane the same modifier stack?

If I understand correctly this is the effect you are aiming for, kind of like a manta-ray wavy hover motion

Hover

Just add a second plane above the first one, subdivide it accordingly, and link the modifiers to the original one. Select new plane > select terrain > Ctrl + L Modifiers.

Make sure both objects have the same displace modifier or most importantly share the same displace texture and with the both Texture Coordinates set to Global

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  • $\begingroup$ Thanks a lot, this is just what I want, with a little modification. I didn't think it would be that hard when I see your answer. The problem is the second plane has it own Displace, of another different terrain type. I would just overlay one on the other so that I can have different type of terrains on my landscape. But as you say they must have the same modifier stack, I guess, I cannot go this way?! $\endgroup$ – AugLe Feb 20 '17 at 18:15
  • $\begingroup$ BTW, do you think there're not really fit, the corners of your blue plane, to the white plane? $\endgroup$ – AugLe Feb 20 '17 at 18:16
  • $\begingroup$ Sorry, but to me the two shapes are not in phase... am I wrong? I still think that a shrinkwrap (negative and project) is better for the blue plane $\endgroup$ – lemon Feb 20 '17 at 18:26
  • $\begingroup$ @AugLe The modifier stack doesn't have to be exactly the same, it only has to use the same cloud texture on a Displace modifier set to Global. You may even have additional Displace modifiers on the plane if you so wish, as long the one of them uses the same terrain cloud texture. $\endgroup$ – Duarte Farrajota Ramos Feb 20 '17 at 18:45
  • $\begingroup$ @lemon now that you mention it they may net be exactly in sync since the cloud texture is a "volumetric" "3D function", and the plane is offset in Z yielding slightly different displace. The closer they are however, the more in sync they should be though, I just offset them for clarity purposes here. In anyway, a Shrinkwrap would also work well here too. $\endgroup$ – Duarte Farrajota Ramos Feb 20 '17 at 18:48

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