Why Union Models is not appear?

[OBCBeeDev (Dane)]

Hello! i just want to ask… that why my Union Models in not appear in Roblox Studio ?
I tried : Reset All Settings 10 times
- Reset My Laptop 2 times

My Settings :

Please help me by the way reply this post thank you so much.

[RoundfIy333]

Unions sometimes get corroupted, also why are you using unions for like a store, if you are not using them to make a brick with a hole, or using them to make moving objects, then you should not use them at all. Cause they take up more processing power to load than the same building with parts, and meshes, which is sorta bad for optimization.

[DMCPEPlays (dmc)]

This is a known issue. Hopefully, this will help you: How to recover invisible / corrupt unions

[OBCBeeDev (Dane)]

welp i used union to make roof for my school also i can not use Blender to creating meshes because my laptop is TOO WEAK :((

[RoundfIy333]

You would’ve been fine using Ctrl+G to group the parts together to create a model, it has about the same effect, also make sure everything is anchored too.

[itsokayepic]

Blender has been getting better in terms of performance, if you aren’t rendering anything with it, you should be fine. I highly recommend using it for important stuff because unions can get corrupted.

[ChronicBuilder (Paulino)]

When unions don’t appear it means one of two things, one it just hasn’t loaded in yet and could take sometime, usually exiting studio and then opening the place again does the trick, or two its corrupted and can’t load and you need to redo it!

[XxRainejoy21xX (CC_UkRaine)]

You should use Union for making a hole and other stuff

[OBCBeeDev (Dane)]

Welp… i tried and waited for more than 5 mins but still not appear.
I also tried save it to file, model and export it into roblox again :((

[ChronicBuilder (Paulino)]

It could just be a corrupt union then. It may be worth remaking it depending how complex it is!

[Ulxqra]

Do not use unions for normal blocks. Only use them for making holes etc.

[Confederation_Major (3DBlenderEnthusiast)]

@OBCBeeDev If you are experiencing this problem concistently, you should convert your models to meshes (OBJ Files or FBX Files)

@DanTDM_Rocks999

How to Easily Convert Unions To Meshes
It is so easy that you can do it in just 2 steps.

1. Export the union
   
2. Create a MeshPart
   
3. Click on the folder icon next to MeshId and select your .obj file
   

Congratulations! You have now converted your union into a mesh. This is incredibly useful, especially if you do not know how to use third-party modelling apps

[OBCBeeDev (Dane)]

it show me this ;( cri

[Confederation_Major (3DBlenderEnthusiast)]

@OBCBeeDev Then, if you can’t export OBJ files…
You could try separating your corrupted unions, simply separate your corrupted unions until they becomes fully visible, and then, re-unionize the union!

---

When you separate your union, you get back the old union data (this means that if you separate it, it will basically go back in time in the moment when you made it

[OBCBeeDev (Dane)]

@NerfLambdaWarrior120

You could try separating your corrupted unions, simply separate your corrupted unions until they becomes fully visible, and then, re-unionize the union!

lol yes i did, i separated them each part and re-union them but still can, sometimes it take me more time i thought, i think i will re-start at the first time re-build the roof.
Oh and thanks for your reply, thank you!

[Confederation_Major (3DBlenderEnthusiast)]

@OBCBeeDev

lol yes i did, i separated them each part and re-union them but still can, sometimes it take me more time i thought, i think i will re-start at the first time re-build the roof.

I still don’t know how it doesn’t works, you always get back to the old union data…

Also, if you made your union in steps you could re-do thoos steps as well!

[Confederation_Major (3DBlenderEnthusiast)]

This is what i mean with “steps”:

@unidentifiedchris

To first understand how CSG can affect performance in your game we first need to understand it.
Constructive solid geometry, or CSG is what unions are, whenever you make a union you make a complex shape, this shape has several different parts, this all depending on the complexity of your union. There are two supported kinds of CSG by Roblox, unions and negates, there is a third kind of CSG which Roblox doesn’t support which is intersection. We can deconstruct CSG in binary trees, for example, if you grab a Part and a NegativePart, you will have 2 parts, you can de-construct these in a tree the components of these being:

Tree

With this image in mind you will have a further understanding into how unions may lag your game, as more complex your union gets the more leaves this tree will have, picture each leave as something that the player has to load in every time the game starts, this is the same case with meshes, but we will be covering them later on this tutorial. So if you really want to increase your performance it all goes down into the quality of your CSG, if your CSG is poorly made then it will lag your game, if there is no room for simplifying your unions even more, follow the next steps.

@OBCBeeDev Also if you don’t know how to separate a union, here is an example:

https://streamable.com/vcldzx

[OBCBeeDev (Dane)]

lol i did that step too!, i Separated them but it not appear like that, it just gone lol.

[Confederation_Major (3DBlenderEnthusiast)]

Well, i recommend you check your bandwidth, Unions are made with bandwith (i confirmed this trying to make a union without wi-fi connection, when i tried to make it, it simply corrupted) If your bandwidth is low, try to get a better internet connection

But if you got a bad bandwidth… i don’t know…
Maybe try 3D Builder ?

But before this, what are your pc specs?

[LeVadamE]

The unions are corrupted. Try to remake them in blender or just reunion them in studio.