When using the "blender unwrap mode" the object face should have a uniform texel density (pixel/world meter) in width & height, however it is currently not possible to get it, set it (which would be very useful to quickly apply the same density between multiple surfaces), or to rotate UVs while preserving X/Y density, on non-square textures.

I realize rotation might be an absolute pain, but having it, even just for 90° increments would be immensely useful already.

In Blender 4.1, when I was doing a Square Fit Unwrap of a UV sphere, I get an "index out of range error"

I'm relatively inexperienced, so if there's a step I'm missing, please let me know. Thank you for all your hard work!

Python: Traceback (most recent call last):
File "C:\Users\username\AppData\Roaming\Blender Foundation\Blender\4.0\scripts\addons\DreamUV-master\DUV_HotSpot.py", line 500, in execute
main(context)
File "C:\Users\username\AppData\Roaming\Blender Foundation\Blender\4.0\scripts\addons\DreamUV-master\DUV_HotSpot.py", line 75, in main
bpy.ops.object.shade_smooth_by_angle(angle=0.523599)
File "D:\PROGRAMS\BLENDER\4.0\scripts\modules\bpy\ops.py", line 109, in call
ret = _op_call(self.idname_py(), kw)
AttributeError: Calling operator "bpy.ops.object.shade_smooth_by_angle" error, could not be found

Tried it out with Blender 2.9, and I get these errors in the console and the panel won't register.

https://user-images.githubusercontent.com/20190653/125646285-313bb39c-3016-4b3a-9adf-5fc84bb4318a.mp4
Removing the 2 last arguments works as a fix, but still thought I would report it :)

Move:

Python: Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\blender-3.0.0-alpha+master.49a363f0e0d8-windows.amd64-release\3.0\scripts\addons\DreamUV-master\DUV_UVTranslate.py", line 219, in modal
    bmesh.update_edit_mesh(self.mesh, False, False)
TypeError: update_edit_mesh() takes at most 1 positional argument (3 given)

location: <unknown location>:-1

Scale:

Python: Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\blender-3.0.0-alpha+master.49a363f0e0d8-windows.amd64-release\3.0\scripts\addons\DreamUV-master\DUV_UVScale.py", line 193, in modal
    bmesh.update_edit_mesh(self.mesh, False, False)
TypeError: update_edit_mesh() takes at most 1 positional argument (3 given)

location: <unknown location>:-1

Rotate:

Python: Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\blender-3.0.0-alpha+master.49a363f0e0d8-windows.amd64-release\3.0\scripts\addons\DreamUV-master\DUV_UVRotate.py", line 128, in modal
    bmesh.update_edit_mesh(self.mesh, False, False)
TypeError: update_edit_mesh() takes at most 1 positional argument (3 given)

location: <unknown location>:-1

Mirror:

Python: Traceback (most recent call last):
  File "C:\Program Files\Blender Foundation\blender-3.0.0-alpha+master.49a363f0e0d8-windows.amd64-release\3.0\scripts\addons\DreamUV-master\DUV_UVMirror.py", line 61, in execute
    bmesh.update_edit_mesh(mesh, False, False)
TypeError: update_edit_mesh() takes at most 1 positional argument (3 given)

location: <unknown location>:-1

Hey there !
Thanks for this absolutely amazing Addon !
Especially the Hot Spot Tool is pure magic :)
But sometimes the results are rotated by 180 from the center.
I used your example atlas.
Do you have any idea how i can prevent that from happening ?
Thanks

Hello there and first of all, thank you for this amazing tool.
I am running into some issue that makes in a cylindrical shape faces, to get interpreted as individual UV Islands. In cubes and flat surfaces works fine, but is it there any threshold that's is causing this? I remember testing it a year ago in a previous version and was working fine,

When using Blenders regular rotate/grab/scale operator in the 3D viewport, youre able to type in numbers to specify amount as well as press X/Y/Z or shift X/Y/Z to specify the axis, would be awesome if DreamUVs translate/rotate/scale operators supported this behaviour as well <3

As title says, in 2.92 it appears that the resulting hotspot UVs are sometimes mirrored about 0,0 (same behavior as CTRL+M with pivot set to 2d cursor at 0,0).

This happens regardless of whether the flags are checked:
duv_useorientation
duv_usemirrorx
duv_usemirrory

or any other flag for that matter, including texture size.

Images:

Steps to recreate are uncertain, it seems to happen depending on how many objects are present in the scene, I can't quite pinpoint when it starts falling apart or why. As such sharing a stripped down version of the .blend file is not feasible.

IE. I have taken the exact problematic object and hotspotted it in an empty .blend file only to achieve the desired result...

Example .blend file available privately upon request.

Blender versions 3.2.1

if I press either Move or the ^ arrow buttons this error is thrown:

Python: Traceback (most recent call last):
  File "C:\Users\Carl\AppData\Roaming\Blender Foundation\Blender\3.2\scripts\addons\DreamUV-master\__init__.py", line 102, in draw
    op.direction="up"
AttributeError: 'VIEW3D_OT_dreamuv_uvtranslatestep' object has no attribute 'direction'

Blender changed smoothing and now this error occurs.

AttributeError: 'Mesh' object has no attribute 'auto_smooth_angle'

Is there any work in progress to update DreamUV to version 3.6 or 4.0?

I've attached a sample where the aspect of some faces are not correctly calculated (pointed out with the annotation).

Hotspot Aspect Error.zip

The face I point out keeps getting matched with a square in the atlas.

I hope the attachment helps.

DreamUV is not working in 2.93.

I am assuming this is to this to the updates to the API in 2.93 and is related to Python being upgraded in Blender 2.93 tp version 3.9.1?

When the scene is entirely blank, without any object at all the View3D panel crashes.

An idea for a fix:

class DREAMUV_PT_uv(bpy.types.Panel):
    ...
    @classmethod
    def poll(cls, context):
        return len(context.scene.objects) > 0

An idea I have is to prepare an atlas that has segments for walls, floors and ceilings. By making the atlas in the form of a cube I could tell DreamUV what face normals each part of my atlas should use.
This way DreamUV could for example properly map a bunch of corridors and rooms, identyfying walls, floors and ceilings.

Hi,

Any chance for an increase in performance for Dream Uvs when used on a mesh with a lot of seams? Most times it would take not less than 6 hours for it to calculate. Most times I have to break the mesh into multiple parts for it to work faster.

Would appreciate any improvement in the time it takes to hotspot meshes with a lot of seams.

Also UV sync selection affects UVs when hotspotting.

Also thanks for making this addon available for others to use.

I think it would be cool if the hotspot object was directly tied to the material some how. This way we wouldn't need to constantly pick the object all the time.

Maybe in such a way that such a material was portable between .blend projects? ie appending the data would bring the hotspot object along for the ride.

Selecting faces as seen in the image above and then clicking Hotspot will crash Blender.

I have noticed that deselecting the triangle that makes part of the inner square and clicking Hotspot will not crash Blender.

This is 100% reproduction for me.

Even better would be if we had support for all of these, but its okay either way :) Awesome addon

https://streamable.com/uqwr9l

Hello, this tool is amazing, so I just started to test it out and I don't know how to fix the first issue already:

As soon I press HotSpot, the faces are flipped?

My first idea was to simply flip normals, but it doesn't help:

Anyone knows whats going on and how to fix this?

Something that I keep coming back to in my mind is some sort of way to represent multiple materials on a single atlas, or as part of a trim sheet workflow. One way to do that would be to have the faces of your atlas object assigned different materials (custom face data would be ideal, but I don't know if Blender's API allows for that. Then you can add an option to the Hotspot operator to pick a material index which will limit the faces to those with the correct material. That way you can have a more complex material in a single atlas, ie. sheet metal with or without bolts, seams, emossing, etc. that only uses a single in-game material on your final atlas.

@leukbaars Hi, hope you are doing well.
Any chance we could pls pls get an update for Blender 3.0? This addon is so useful.

Thanks so much for this addon

Cheers,

hey love the tool, use it all the time! 💯 ❤️

i'm hoping we can add a feature to randomize the distribution of uv's onto atlas parts of similar size

i think these screenshots will help illustrate the request

1. here is my atlas object
   
2. here is the atlas in wireframe, see how I have 5 planks of roughly the same size?
   
3. these are the planks I want to hotspot
   
4. ⚠️ the issue is that all of the planks are allocated to the same part of the atlas
   
5. 💡 i'm hoping we can add some way to incorporate randomness to these uv allocations during hotspotting

this would really speed up my workflow and I think people would appreciate it 👍

i have some coders on my team, and maybe i could persuade them to contribute, if you could offer some pointers on how we could make a good pull request for this 🤝

thanks! 👋

Hey Bram,

Any chance you're still using this, and you'd share your updated code?
There's an alternative in Magic UV but I prefer the way this one functions!

For a nice qol touch, I think have each section be collapsable would be nice, instead of it be scrollable etc

Having an interesting food for thought: What if DreamUV utilized a separate texture that uses an alpha so then it can be mapped on a separate material and UV to wrap details such as edge wear, etc on the edges?

I'm sure you're aware of this but figure it may be something to point out, mostly cause of round edges:

The Circle UV island fits perfectly but leaves part of the UV Edge Wear out. So when I meant a separate texture with alpha for edges, I was thinking of this:

(Original):

(Alpha Texture for Edges):

Not the best texture example, but nonetheless...

So then using the alpha texture, DreamUV could calculate the edges where to bake the edges on an another material alongside the original atlas texture material. While also utilizing a secondary UV map:

I do imagine that the theoretical idea sounds difficult to implement but figure I mention this idea, just for curiousity. 😄

I see by the commit history, it looks like a brand new tool/feature, but do you have any documentation on how it works? Can I use the same geometry as the Atlas Object? How do I define the trim index and cap index? Thank you, it's a great tool!

Hello! I've been using this plugin for a while and I really love it.

Recently, I've noticed an issue where I get an error if I try to unwrap meshes that have triangles in them instead of quads. For instance if I take a cube and bevel its edges, there will be triangles at each corner, and if I try to unwrap it with DreamUV, I get an error. If I select each face except for the triangles, it unwraps without issue. I think this may be a Blender 3.0 related issue because in earlier versions I seem to recall DreamUV would try to fit the triangles into the hotspot map anyways, and wouldn't give errors. Here is the error it gives me:

DUV_HotSpot.py, line 184, in execute is_rect = DUV_utils.square_fit(context)

DUV_Utils.py, line 617, in square_fit bmesh.updated_edit_mesh(me, True)

TypeError: update_edit_mesh() takes at most 1 positional argument (2 given)

I tried this also with ngons, and got the same error. It seems to give this error when there are any faces that are not quads, which seems new to this version of the plugin (at least as far as I can recall).

All in all it's a fairly minor problem as it is easy enough to only select the quads for unwrapping in most cases, but I thought you should be aware of it.

Feature Request

Ability to use Blender Shortcuts G for Move, S for Scale and R for rotate of UV`s

Not sure how feasible this is, but I'm trying to see if there might be a way to do uv sculpting (Grab, Relax, Pinch) in 3D view. I'm currently using Blender for adjusting uv flows to create a faux flow map.

It'll allow some of this functionality w/o needing to create an actual map. Right now I do the same thing, but in uv view, so there is some guessing involved. More importantly, it'll eventually cause some tears in the uv border.

This might be too niche of an approach, but I use geometry nodes and collection Boolean to mimic CSG brush modeling in blender, and as a result, I tend to have structures built with a lot of loose cubes that are fused into a single mesh later.

Currently, DreamUV doesn't appear to allow editing multiple objects at the same time and to extend UVs between those objects.

Would it be possible to have the relevant tools support selecting faces from multiple objects?