Why Union Models is not appear?

[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