Fast way to merge object

Support Modeling
1

Hello,

I would like to know if there is a fast way to do the above things.

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I would like to merge the left part of the blue rectangle with the green one.
For now, I difference boolean the blue one with the green one then I displace the result so that it overlap with the green one and finally union them. I work with much more complex shapes, this is a simplified example.
With complex shapes, it takes a while to compute, so I was wondering if there is a tool that I’ve missed that can achieve this kind of workflow.

Thanks in advance,

2

Hello, yeah, here it is

select both of those objects by pressing SHIFT, then LMB alternately on each of them, and then press CTRL+J

Hint: if you have added some modificators to your objects before, you need to apply them at first.

3

I think you wanna have a look at the docs.blender manual addons object bool_tools Addon…

4

I’d rather suggest a partially different workflow. With the blue mesh selected, go to sculpt mode and use box trim or line project and choose the cutting border so that the cut part reaches completely inside the green volume.
Then go back to object mode, select both meshes and make a BoolTool-Union.

5

Thanks for the tips.
I think my question wasn’t clear enough. My final goal is to go from this :

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To this :

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I want to keep only one part of the green object and union it to the blue one.
My problem is that if I do the difference, faces overlap which is the expected behaviour :

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Then if i Union them the mesh has the overlapping which I don’t want, I’m expecting this :

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I hope this is clearer !

Thanks,

6

Thanks this works great for simple object but for complex shape I don’t think I can apply this process :confused:

7

It would be easier to help if we could see what you are talking of , but be aware that you can also do much more complex cuts with “Lasso trim” in sculptmode. Alternatively you could also make complex selections and fair those vertices, with the same basic workflow in mind.

8

It’s for a 3D project that I have in my mind !
this is just an example but for example it will be something like this
image

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And I would like to keep only the “outside” part of the torus.

9

Well I’d rotate the camera that I’d see the torus from the top and do a lasso trim in sculptmode.

10

Ok thanks. I was just wondering if blender had an option or an add on to select which part of the object to keep as it exists in other 3D software !

11

That kind of option exists for bisect, but boolean operations can have much more separate parts than just two. How would you choose what to keep?

12

I was thinking of the following :

  • Select the base object then the object to add
  • Press some key binding that highlight the part to merge with on hovering with the mouse

I’ve seen that somewhere (maybe in Rhino I don’t remember) and that was pretty cool !

13

No there’s no builtin tool that does something like that.

2 Likes
14

Thanks again !