Wrap-R for SketchUp

Gábor · 11 Aug 2017, 19:30

Hi there! Any news about an OSX version? Thanks!
Hi,

Currently we are focusing on getting out the Windows version from the Beta phase and release the stable version. If we will see a big interest on the market for the OSX version we will come oot with that as well.

Stay tuned.

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optimaforever · 6 Oct 2017, 17:28

Hello

How can I reaffect a svg file created by wrapr in sketchup or wrapr?
I tweaked the bydefault unwrap by WrapR because it's highly basic and there were a huge waste in texture estate and tried to save the final UV layout as svg but I don't understand how I can reimport this in SU.
Thanks in advance,

Rich O Brien · 6 Oct 2017, 17:33

The SVG is used to open in an image editor to paint your textures over the UV islands.

Moving the islands in the SVG does not change the UV positions of the 3D mesh.

The reason we export to SVG is that the SVG is scalable to any size as long as it maintains the ratio.

SketchUp doesn't not import SVG files. The export to SVG is purely to allow you to paint the islands with the textures you need in an app of your choice.

optimaforever · 6 Oct 2017, 18:04

@rich o brien said:

The SVG is used to open in an image editor to paint your textures over the UV islands.

Moving the islands in the SVG does not change the UV positions of the 3D mesh.

The reason we export to SVG is that the SVG is scalable to any size as long as it maintains the ratio.

SketchUp doesn't not import SVG files. The export to SVG is purely to allow you to paint the islands with the textures you need in an app of your choice.

Thanks Rich,

Is there a way to save the UV unwrap layout apart from saving the skp?
Now I have a great 4k map drawn in Substance Painter but I can't get it back to SU.
And I can't import the DAE (export as sketchfab from SP) inside 3dsmax neither as there are normal tangent issues and no surfaces are generated...

All I can try now - if I understand correctly- is to replace the UV islands on the previous layout in WrapR thanks to the svg after having it converted in Photoshop or Illustrator.

Is it possible to have a better unwrapping algorithm someday? And some in depth tutorials too
Thanks for the plugin anyway, it was a missing chain in the workflow!

Rich O Brien · 6 Oct 2017, 18:08

Did you watch the videos here...

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(wrap-r.com)

I think the second and last one has the info for the SP workflow.

But, you are correct I need to provide more forthcoming tutorials on using WrapR. Mic is ordered so expect more soon.

optimaforever · 6 Oct 2017, 18:13

I think I've seen them dozens times...
Yet I have a problem as sometimes SU hangs or crashes during the import of UV from WrapR phasis.
Not to mention sometimes I can't get the UV back and the fbx exported to SP doesn't contain any unwrapping information.
So exporting UV to SP directly works nice (always) but if I can't get the unwrapping infos back in SU, it's pretty useless (unless using marmoset toolbag as final render)...

EDIT:

when I launched WrapR first time, I didn't have the shortcuts visible in the menus (even if they worked already). Now that I've configured my own shortcuts, they still aren't visible in the menus, although they are in your tuto videos.
when using UVselect and move, even selecting a few points (instead of all points of the island) suffice to move the whole island. But, when using mirror, I need to select all the points of the island. This beahaviour mismatch is a bit troubling and confusing.
is there a way to stretch (scale in one axis only) an island?
I don't understand how to use the 4 maximum tools, nor the relax.

Rich O Brien · 6 Oct 2017, 18:45

Can you share a sample mesh I can look at?

Try it via email richob[at]sketchucation.com

optimaforever · 7 Oct 2017, 08:52

Thanks Rich.
Right now I created a high res bitmap from svg with Illustrator and reinput it within SU to my mesh, re-exported the mesh to WrapR and am busy trying to match the mesh with the texture-svg layout.
I notices there is a parallax between the texture (in this case my previous unwrap layout rasterized) and the mesh. When moving the camera, the texture plane seems to be lower so there is a growing parallax when looking at the border of my screen, compared to the center.

optimaforever · 7 Oct 2017, 10:07

What are the color conventions for the stretched areas?
green = good
red = too compressed
blue = too dilated ?

I noticed the stretch analysis needs to be refreshed manually. Is it too mush work to have a realtime analysis?

optimaforever · 7 Oct 2017, 10:43

I also noticed that each time I cut an edge in WrapR, it refreshes the whole UV layout.
Is it possible to get rid of this behaviour?
Sorry to come with all these questions after having been so lazy and silent during the beta.
I could ask you by PM but I think some other users (noob like me ;D) could be interested to know the answers.

Rich O Brien · 7 Oct 2017, 10:44

Turn live unwrap off from the toolbar. Second last icon.

Rich O Brien · 7 Oct 2017, 11:32

@optimaforever said:

Can you explain exactly how the live unwrapping work?

Every time you cut it tries to adjust islands to best fit. Turn off Live Unwrap to disable this adjustment

You can also pin any islands to prevent moving.

You can't move vertices with Live Unwrap On because the best fit will snap it back to the desired position.

optimaforever · 7 Oct 2017, 11:35

Can you explain exactly how the live unwrapping work?
In the menu Mapping, there's also a Live Unwrap option.

Whith Live unwrapping button toggled OFF (the Live Unwrap option gets ticked in the menu???),
I try to move a single vertex, it quickly comes back to the initial point. I have to select at least two points to be able to move them but the island gets moving.

Whith Live unwrapping button toggled ON (the Live Unwrap option in the menu gets unticked),
I can move a single vertex as intended. Yet, I'm afraid of cutting edges again, because of the risk of getting the whole layout "refreshed" (= must redo all my painstakingly manual layout) just because I modified a tiny bit the geometry.

In fact, I'm so afraid of losing the Unwrap layout that I can't close WrapR until I've done all the Substance painting and reimporting textures inside SketchUp.

EDIT: sorry, still learning WrapR

I like to understand how everything works under the hood.
When saving in WrapR, it writes a skp in the WrapR folder inside the place where the original skp is, with the name of the material in SU. And then, back in SU, when reloading from WrapR, what happens exactly?

Do I have to resave the original skp in SU to "bake" the unwrap or is it implicit?

When trying to open this skp in WrapR directly, it doesn't work because WrapR doesn't accept skp files with components/groups. While this component has been originally created by WrapR itself when exporting the model from SU.

In order to open the skp in WrapR, I have to explode the component/group. Doing that, I lose all the quads and seams.

I tried to "save as" a new independent skp from WrapR, just to get a file I could load into WrapR in case my computer crashes during the Substance Painter work. Can I reload this skp in WrapR and get all the island layout as previously defined or will it "rebuild" all in its fashion (angle best or LSCM)? Well, I'll try later if I need it.

optimaforever · 7 Oct 2017, 11:37

@rich o brien said:

@optimaforever said:

Can you explain exactly how the live unwrapping work?

Every time you cut it tries to adjust islands to best fit. Turn off Live Unwrap to disable this adjustment

You can also pin any islands to prevent moving.

You can't move vertices with Live Unwrap On because the best fit will snap it back to the desired position.

Ok, so I guess "best fit" is defined by the least stretched approximation algorithm (angle best or LSCM)?
So you mean I have to always pin all the other islands to prevent them from the Live Unwrap issue...
Does the saved skp remembers the pinned status of the UVs when reopening the skp? If yes, Do you recommend saving the skp with all the vertex pinned?

Rich O Brien · 7 Oct 2017, 11:45

@optimaforever said:

Ok, so I guess "best fit" is defined by the least stretched approximation algorithm (angle best or LSCM)?

Yes, Angle Based or LSCM, use different resolving methods to minimize texture distortion. For more regular forms Angle Based is used. For more organic use LSCM.

So what happens in the unwrap is that the islands are placed based on their bounding box size and then scaled to fit in the UV space.

There's a 3rd method we have planned called Harmonic which will resolve non-manifold mesh to have no distortion.

optimaforever · 7 Oct 2017, 12:20

Thanks Rich

Is it possible to define a padding value for the auto layout?

Btw sometimes when moving/rotating the island there are unwanted random scaling of the islands.
How to avoid them?

Rich O Brien · 7 Oct 2017, 12:56

No way to add padding...yet

The easiest way to move/rotate/scale is to use the 3D view to pick your islands by double clicking in the 3D space.

No need to switch tools from Uv select to move or rotate.

Click to play GIF

If you select UV move it only moves in the 2D space. In the 3D space, the UV select tool is always active. So I tend to use the 3D view to pick islands and use the 2D view for moving, scaling etc...

optimaforever · 7 Oct 2017, 13:07

Ok, thanks!
I can't find the nice wrapr tiles texture you use in the videos.
Is there a way to install them?

Rich O Brien · 7 Oct 2017, 13:09

Not yet, but check your email inbox

optimaforever · 7 Oct 2017, 22:03

Cool... I finally did it.

The chassis is an old model of my Javelin I made with SketchUp 4.
I never quite succeeded in modeling the Optima body (lexan) because of the tools lacking in SketchUp, but with the recent addition of SubD and QFT, I was confident to be able to model it correctly.
Yet I missed an unwrap tool as I didn't want to go the 3dsmax way to make all the complex painting scheme, not to mention the rich decals.

Sketchup 2017 + SubD + QFT + WrapR + Substance Painter 2.6 + Thea Render 1.5 + Photoshop