UVWarp modifier does not work properly #59330

New Issue

Flester Iulian · 2018-12-13T20:47:55+01:00

Flester Iulian commented

2018-12-13 20:47:55 +01:00

System Information
Operating system: Windows 10
Graphics card: Nvidia

Blender Version
Broken: UVWarp modifier does not work properly

(example: 2.79b release)
(example: 2.80, edbf15d3c0, blender2.8, 2018-11-28, as found on the splash screen)
Worked: (optional)

I have attached the blend file here.
http://sodasi.com/robot-bug.blend

As you can see if you move the bone the mapping is very wrong no matter how you change uv axis. I really hope I'm not going to waste your time, but I spend 1 week trying to figure out what to do, so I made sure the uv is not mirrored on both objects, I used any combination possible for uv mapping.. but nothing so far..

Steps to reproduce

Add a cube
Subdivide this few cuts
Add 2 materials, on second material add a uv layout -> part of the cuube, asign the uv and material to this
Unwrap, and assign image
add a plane with the image and unwrapp it
add 2 bones
the smallest bone call it target, the second root
8 add a UVWarp modifier -> setup armature to these bones
go to pose mode and move the target (from "From" column)
10 Result. The mapping is very very very very wrong

Expected result -> when you move the target bone, the mapping should be correct

**System Information** Operating system: Windows 10 Graphics card: Nvidia **Blender Version** Broken: UVWarp modifier does not work properly (example: 2.79b release) (example: 2.80, edbf15d3c044, blender2.8, 2018-11-28, as found on the splash screen) Worked: (optional) I have attached the blend file here. http://sodasi.com/robot-bug.blend As you can see if you move the bone the mapping is very wrong no matter how you change uv axis. I really hope I'm not going to waste your time, but I spend 1 week trying to figure out what to do, so I made sure the uv is not mirrored on both objects, I used any combination possible for uv mapping.. but nothing so far.. Steps to reproduce 1. Add a cube 2. Subdivide this few cuts 3. Add 2 materials, on second material add a uv layout -> part of the cuube, asign the uv and material to this 4. Unwrap, and assign image 5. add a plane with the image and unwrapp it 6. add 2 bones 7. the smallest bone call it target, the second root 8 add a UVWarp modifier -> setup armature to these bones 9. go to pose mode and move the target (from "From" column) 10 Result. The mapping is very very very very wrong Expected result -> when you move the target bone, the mapping should be correct

Flester Iulian commented

2018-12-13 20:47:55 +01:00

Added subscriber: @iulian.flester

Flester Iulian commented

2018-12-13 21:00:28 +01:00

I forgot to mention that I'm following this tutorial
https://www.youtube.com/watch?v=5NlvgMYZgaY&list=PLda3VoSoc_TR7X7wfblBGiRz-bvhKpGkS&index=63

And this is the mouth image

https://www.dropbox.com/s/knjoc3jfd0m1gel/mouths-layout-16.png?dl=0 ]]

I forgot to mention that I'm following this tutorial https://www.youtube.com/watch?v=5NlvgMYZgaY&list=PLda3VoSoc_TR7X7wfblBGiRz-bvhKpGkS&index=63 And this is the mouth image https://www.dropbox.com/s/knjoc3jfd0m1gel/mouths-layout-16.png?dl=0 ]]

Sebastian Parborg commented

2018-12-14 17:56:30 +01:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2018-12-14 17:56:30 +01:00

Changed status from 'Open' to: 'Archived'

Sebastian Parborg closed this issue

2018-12-14 17:56:30 +01:00

Sebastian Parborg self-assigned this 2018-12-14 17:56:30 +01:00

Sebastian Parborg commented

2018-12-14 17:56:30 +01:00

This is not an issue with 2.8. The same thing happens in 2.79. You simply tried to map the wrong axis to the UV moment.
In the tutorial he mapped the image on the global XZ plane while you tried to do the same but in the YZ plane (and thus the settings can not be the same for it to work)
I have attached a file where I simply rotated the plane and now it works: robot-bug_fixed.blend

This is not an issue with 2.8. The same thing happens in 2.79. You simply tried to map the wrong axis to the UV moment. In the tutorial he mapped the image on the global XZ plane while you tried to do the same but in the YZ plane (and thus the settings can not be the same for it to work) I have attached a file where I simply rotated the plane and now it works: [robot-bug_fixed.blend](https://archive.blender.org/developer/F5953862/robot-bug_fixed.blend)

Flester Iulian commented

2018-12-14 20:26:21 +01:00

So you are saying that in order this to work it has to be oriented in a specific way .... This sound to me like a bug: I never said is 2,8 issue. It replicates to 2,8 and 2,7X as you sa said. So I think there should be a solution for this to work, like maybe add -X, -Y and -Z ... I don't know, but the way is now is very very confusing. I guess just multiplying by -1 on x,y,z should do the trick and offer alot more options.

Thank you very much for taking time to respond to my bug.
Happy Christmass

So you are saying that in order this to work it has to be oriented in a specific way .... **This sound to me like a bug**: I never said is 2,8 issue. It replicates to 2,8 and 2,7X as you sa said. So I think there should be a solution for this to work, like maybe add -X, -Y and -Z ... I don't know, but the way is now is very very confusing. I guess just multiplying by -1 on x,y,z should do the trick and offer alot more options. **Thank you very much for taking time to respond to my bug.** Happy Christmass

Sebastian Parborg commented

2018-12-14 21:04:12 +01:00

The bones you are using has to have a specific orientation, yes. You are actually not using the global axis but the local bone axis. For bones the Y axis is following the direction of the bone.
Which is why in the tutorial you mapped the U coordinate to the X axis and the V coordinate to the Y axis.

So if you want to use some other orientation, you simply rotate the bones until they point in the correct way for that view.

The bones you are using has to have a specific orientation, yes. You are actually not using the global axis but the local bone axis. For bones the Y axis is following the direction of the bone. Which is why in the tutorial you mapped the U coordinate to the X axis and the V coordinate to the Y axis. So if you want to use some other orientation, you simply rotate the bones until they point in the correct way for that view.

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UVWarp modifier does not work properly #59330