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Sand Trails in C4D

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JoanPablo Torres
Sand Trails in C4D
on Jan 1, 2018 at 4:26:04 pm

C4D R17 Scene

So I have a plane as my floor with a collision tag

Several Spheres using Mograph and a Rigid tag so they interact with one another

A animated sphere with an Attractor tag so all the other spheres follow it around the scene.

What I'm trying to achieve though is when the spheres collide with the floor (sand texture) they make a trail. Currently they make an indentation (which is good) but once they move, there are no physical trails, just indents that follow the sphere around.

Any ideas to have the trails remain?



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Brian Jones
Re: Sand Trails in C4D
on Jan 2, 2018 at 4:57:03 am

how are the dents in the floor currently being made? What's the floor (a plane or a Floor (or something else))?


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JoanPablo Torres
Re: Sand Trails in C4D
on Jan 2, 2018 at 10:01:17 pm

2nd line of my post

Plane with a collision tag


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Marc Fovargues
Re: Sand Trails in C4D
on Jan 31, 2018 at 12:43:24 pm

After having a quick look this is what I did.

1. Add a Plane object underneath your sand plane and offset it on negative Y but, not beyond the depth of your spheres so they still show.
2. Apply a Static Rigid Body tag to this new plane and remove it from your sand plane if there is one, and make sure the Collision Deformer is applied to your sand plane. Collision Deformer will do the work.
3. The sand plane will need 100-200 (maybe more) subdivisions to look convincing but you can cache the result in the Collision Deformer.
4. In the Collision Deformer Object tab set the Falloff to Surface (Collider is best but much slower at computing result) and Restore Shape to 0% (Play with this for the effect you want).
5. On the Collider tab set it to Outside (worked for me, again play with the options).

Your spheres should now leave trails as they roll about :)


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