It doesn’t. No matter what is the size of the part, it would only cause lag if there are like thousands of parts, irrespective of their sizes. Would suggest to keep part count below 5k to prevent lag in most devices. (of course, it may still lag in really old computers/ mobile wifi computer players)
Full Answer
Fully transparent parts do not go through rendering. But, it does not help your game's performance. If you want to use fully transparent parts when you are blocking off certain areas of the map, or fixing hitbox issues, that is totally fine. Just know, this will not improve performance.
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.
CanQuery determines whether the part is considered during spatial query operations, namely GetPartBoundsInBox , GetPartBoundsInRadius and GetPartsInPart . These functions will never include parts whose CanQuery is false.
Mesh A has 5000 polygons and Mesh B 2000, ofcourse, Mesh B will cause less FPS drop and lag because it has less polygons. Models are kind of just “collections” of parts and other things, so those won't lag a lot, only if there is stuff inside that make it lag.
From personal experience unions actually don't reduce lag, even though they do might seem to reduce amount of parts.
BasePart. CanTouch lets your determine if the part will trigger Touched / TouchEnded events on other BaseParts with TouchTransmitters . All BaseParts have CanTouch set to True by default. A BasePart 's Touched or TouchEnded event will only fire if otherPart has CanTouch set to True .
Property of: BasePart. Value Type: bool. Description: This property determines if the part will trigger Touched / TouchEnded events on other BaseParts with TouchTransmitters .
BasePart is an abstract base class for in-world objects that render and are physically simulated while in the Workspace . There are several implementations of BasePart, the most common is Part , a simple 6-face rectangular prism.
Contrary to popular belief, meshes do not create lag.
How to Reduce Lag on Roblox1 Reducing the Graphics Quality in Roblox.2 Improving Your Internet Connection.3 Improving Your Computer Specs.4 Deleting Textures On Windows.5 Deleting Textures on Mac.
Meshes are useful for complex structures, they can be used for many decorations to light up the place. Parts can be used to build the map/structures, they are easy to learn and are easy to access to. Both are necessary in game development. It really depends, but generally Blender meshes.
Anything from the models and plugins section has the possibility to be malicious. But as long as you open up the mesh and check for anything weird inside it, such as a script, then you should be fine.