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Bill Borez

Particles along a diplaced shader map

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OK. I have a problem I can't work out.

 

I have a sphere which I'm emitting X particles from and using an XPfollow surface and Xp trails so that particle lines flow around the surface of the sphere, all good, it works no problem.

 

My problem comes from using a displacer on the sphere with a custom shader map  ( made  from a JsPlacement .png ) and then raising the height to get a futuristic looking sphere surface. My particles look like they're following the surface, but as soon as I rotate the sphere the particles stay on their original path  so it looks to me like they're following the original sphere geometry and not the displaced surface geometry  of the sphere.

 

How then do I make the particles follow along the displaced surface and not the underlying sphere as it rotates?

 

Thanks in advance.

 

 

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I think I get what your problem is, but a screenshot or better yet, a project file would be really helpful here.  Are you using XP 3.5 or 4?  I only have 3.5.

I just quickly set up a scene based on your description and the particles are following the displaced surface just fine, even if I animate the rotation of the sphere.  What doesn't stay on the surface is the trails, but that's what you'd expect because they are just tracing where the particles have been.  Here's what my setup looks like:
image.thumb.png.982cb9382a0b54fa0bf294de7e3f2594.png

 

And I attached my project file.

XP Trails on Displaced Sphere v01.c4d

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I tried it with a custom scene, I'm not a specialist but for me it worked without problem. I put my scene so that you can look at it. I didn't do anything special. Hope I understood it well.Sphere.c4d

 

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  • 26 minutes ago, natevplas said:

    What doesn't stay on the surface is the trails, but that's what you'd expect because they are just tracing where the particles have been.

     

    Ahh, of course, I wasn't even thinking of this. Obvious once it's pointed out.  Here's a screenshot of the project, the trails should be following the surface but obviously the slow rotation of the sphere is throwing everything out and, as you say, the particles are just being traced from where they've been

     

     

    1949855560_ScreenShot2019-04-16at21_37_49.thumb.png.2195e030b3d255b288cf1e0757a0084e.png

     

    Maybe I need to find another way to do this.

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