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Turbo smooth and vertext weld wrecking uv map

jfjacques
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Turbo smooth and vertext weld wrecking uv map

jfjacques
Collaborator
Collaborator

This keeps happening over an dover but only for a specific piece of geometry. 

 

WHY the **** does turbo smooth wreck my UV? 

 

I need to vertext paint this thing - how do I go about doing that when turbosmooth ****s the uv? 

 

Honestly max is just such a buggy piece of ****..what should take an hour takes days. 

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oliver
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You have answered your question in the headline.
What happens when you're welding away vertices that define an UV-seam? Correct: you screw up your UVs.
In every 3D-software.

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jfjacques
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First off, turbo-smooth alone should not wreck the UVs as far as I know. 

 

Secondly I've used  vertex weld quite a bit in the past without completely buggering the UV's. Maybe I got lucky, maybe the operation was simple, I don't know. 

 

If I have a cube (usually imported from another software) and I add displacement, oftentimes the seams will explode away from each other - is there a way to prevent this without welding vertices? What would the best way to do so? 

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oliver
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Collaborator

I'm not sure if I got it right: you import unwrapped geometry that is cut open? Next you apply TurboSmooth and on top Displace? Then you apply WeldVertices?

 

I tried to reproduce:

1. I created a cube, cut open all edges and unwrapped that.CubeWeld01.jpg

2. Next I assigned a TurboSmooth and on top Displace.

CubeWeld03.jpg

Are these open edges the problem you're talking about?

I was able to solve this by assigning the VertexWeld before Displace (should be possible before TurboSmooth, too):

CubeWeld04.jpg

In this case the UVs stay intact.

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jfjacques
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That's pretty much the process I use when I bring in Geometry that for some reason is not welded. Honestly even if goemetry is joined in rhino or revit it just comes in with vertices unwelded even though it's the same element in 3ds. Wondering why? 

 

In this case applying a vertex weld seems to **** the UV's. I was wondering if there was another workaround. 

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oliver
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Collaborator

@jfjacques wrote:

... even if goemetry is joined in rhino or revit it just comes in with vertices unwelded even though it's the same element in 3ds... 


That sounds odd. 

So instead of trying to repair the flawed result it would be a better solution to find the reason for the faulty import. Unfortunately I have no experience with Rhino or Revit (maybe someone else? hello there!) but I would start with looking for a kind of "Collapse all"-function in those programs and/or looking through the export- & import-settings for some kind of "Import merged" or "Separate by X" setting.

Good luck & stay positive!

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