All basic parts in Roblox have minimal physical properties that needed to be stimulated, while Unions comes in infinite amount of shapes, when you create a Union, Roblox would need to make physical calculations accurate for your game, which can drastically decrease performance. 6 Likes loxergenius (loxergenius) July 19, 2021, 4:18am #4
When you create a UnionOperation, Roblox has to do calculations on what the new object should look like geometry wise.
Additionally, in order to decompose your UnionOperation, Roblox needs to keep track of which parts a UnionOperation exist out of, so the more parts you merge together, the more memory a UnionOperation takes up. Finally, each UnionOperation has its own unique shape, so Roblox needs to generate collision boxes for each UnionOperation.
The reason why you’re getting mixed answers is because it heavily depends on what you’re doing and how you’re doing it. Some background information on how unions work might be appropriate: When you create a UnionOperation, Roblox has to do calculations on what the new object should look like geometry wise.
Unions don’t cause server lag as the server doesn’t have to load the models for the unions, however it causes lag on the client as the client loads the unions, renders them and calculate the physics for the union so you suggest parts instead of unioning like windows…
All basic parts in Roblox have minimal physical properties that needed to be stimulated, while Unions comes in infinite amount of shapes, when you create a Union, Roblox would need to make physical calculations accurate for your game, which can drastically decrease performance.
Unions don't reduce lag nor cause it. the amount of polygons still say the same so your not reducing on that front, the only reason they exist is to work with the negate feature. unioning just make editing builds a hassle don't use if you don't need.
From personal experience unions actually don't reduce lag, even though they do might seem to reduce amount of parts.
It is a common mistake to think that grouping regular parts into unions will improve performance, in reality it actually hinders performance because it gives the game a more complex item to load.
Unions are useful when you want to make small objects of the same material, plus they are quite reliable. I use unions for details on buildings, or stuff like furniture, it just makes it feel cleaner for me without the overlapping parts.
Do not union those parts! That will cause more lag. Not only would it be redundant to Union them all, it would also make the collision boxes of the stairs entirely non-functional (edit, unless you use PreciseConvexDecomposition, which has its own performance impact).
One way to avoid lag is to try and limit the amount of meshes you are using in your game. You can try and make one whole mesh car without huge details. One example could be the cars in ER:LC. They contain one mesh model (with no inside detail) and makes the game less laggy for everyone.
Graphics LagWhile playing, open the in-experience menu by pressing the Esc key.Go to Settings.Under the GRAPHICS section, you can check the graphics level of Roblox.To lower the level, first toggle the Graphics Quality - Auto to disable it. Then make any necessary adjustments to lower your level.
The UnionOperation combines parts together into a single solid model. To use it, select the parts you want to combine and click the Union button in the Model tab. This will create a new part called Union. This function can be used in conjunction with NegateOperation to shape, resize, and create holes in solid models.
Union members earn better wages and benefits than workers who aren't union members. On average, union workers' wages are 28 percent higher than their nonunion counterparts. Labor unions give workers the power to negotiate for more favorable working conditions and other benefits through collective bargaining.
Solid modeling (more commonly referred to as Unions, or a UnionOperation) is a feature in Roblox Studio that combines or negates two or more Parts to form an object called a Union. Solid modeling has been around since 2014, arising from a Hack Week project.
In the 2018 Roblox Developer Conference, it was announced that meshes are indeed better than unions.
One way to avoid lag is to try and limit the amount of meshes you are using in your game. You can try and make one whole mesh car without huge details. One example could be the cars in ER:LC. They contain one mesh model (with no inside detail) and makes the game less laggy for everyone.
The UnionOperation combines parts together into a single solid model. To use it, select the parts you want to combine and click the Union button in the Model tab. This will create a new part called Union. This function can be used in conjunction with NegateOperation to shape, resize, and create holes in solid models.
Graphics LagWhile playing, open the in-experience menu by pressing the Esc key.Go to Settings.Under the GRAPHICS section, you can check the graphics level of Roblox.To lower the level, first toggle the Graphics Quality - Auto to disable it. Then make any necessary adjustments to lower your level.
The more polygons an object has will affect performance. Therefore, using unions to organize parts will have a significant effect on your game’s performance. Also, using unions for other purposes will mess with hitboxes due to it combining multiple parts into one object.
Unions often cause lag because they interfere with the rendering of the object. Contrary to the Models that instead of keep them separate but grouped together. My suggestion for the organization is to always create a folder, then divide the entire buildings into folders.
You should never use unions for organizing. Unions have a whole different purpose that will cause degraded performance and mess with hit-boxes if used to organize your objects. Use grouping or folders, which are meant to organize your objects.