Any way to use Triplanar node without texture maps slipping during animation?

[ssjenforcer191191191]

I have usually only used Triplanar nodes to get non-repeating texture map imperfections in static objects.

I used it in an animating character's materials, and the scratches slip all over while it's moving.

I guess this is normal, but is there no way to get the textures to stick to the character in space?
I tried changing the coordinate space for the node, but that doesn't do anything helpful.  I also tried selecting Pref, but that doesn't do anything, either.

[ssjenforcer191191191 · Accepted solution]

I found another thread with the solution.

https://forums.autodesk.com/t5/arnold-for-cinema-4d-forum/how-do-you-line-up-triplanar-mapping-with-...

I had to add an Arnold tag and check the 'export reference points' under the export tab, and also have Pref selected for coordinates in the node itself.

I wish there was a way to have this by default with Triplanar nodes (I can't think of a case where you would want it otherwise), but I guess the Arnold tag is necessary sometimes for stuff like this.

[peter_horvath]

Normally you only need this technique when your object is deformed and the mesh topology changes. You need the tag to record your reference object at the start of the animation, so in later frames the object is shaded against the reference points instead of the actual mesh (that's the Pref space).