Broken UVs after flow along surface

Rhino Rhino for Windows
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1

Hello ! I am currently working on a project which require to flow objects along a surface and I am having some issues with the UVs.

Here is the 3D surface and its UV unwrap version (mapping channel 1). I took care they have the same number of Us and Vs isometrics.

01
011167Ă—687 93 KB

I also took care they have the same UVs mappings.

02
021687Ă—737 245 KB

03
031686Ă—737 190 KB

Then I modeled my objetcs from the flat surface and I unwrap them (mapping channel 2) to work the UVs.

04
041652Ă—720 131 KB

05
051392Ă—727 158 KB

I then flow them along the 3D surface and when I check their UVs ont the UV editor it looks fine but the rendered mapping doesn’t make sens.

06
061546Ă—751 127 KB

I need help here. I don’t get why the mapping looks like that after the flow. I tried everything, every settings options of the flow along surface.

2

When you are transforming the object, the structure changes and therefore the render mesh will change too. If you can live with mesh objects, you could preserve the structure and mapping, see attached example:

mapping.3dm (563.8 KB)

1 Like
3

Thank you very much !

Yes I am ok with meshes, even more because I need to export a mesh file at the end. And the flow is faster with meshed objects.

What I don’t understand with your file is that when I open it, the mesh object has a broken mapping. But when I make the flow on surface myself, the mapping is correct…

07
071268Ă—650 106 KB

09
091257Ă—630 94.6 KB

And on my part the problem still exist even with mesh objects.
I converted the NURBS in meshes and the mapping is still fine on the flat version but when I flow the meshes the mapping is broken

10
101712Ă—782 214 KB

11
111532Ă—782 173 KB

Here is the file if you want to have a look:
problem flow UVs.3dm (2.7 MB)

This is a file I made to show my problem. But this happen whatever I am working on

4

that’s odd, looks buggy. HistoryUpdate also fixes the mapping.
RH-82989 FlowAlongSrf mapping doesn’t update

1 Like
5

hi @Lambert_Baptiste Jussi has added a way to make this possible in the latest 8.11, let me know if you want to try this out and I can provide you with a daily build that supports this.
It is still a bit of a workaround though, for reasons mentioned in the YT.

1 Like
6

Hi @Gijs that’s great ! Yes I would like to try it please.

7

pm sent