Mouse Cannot Detect Parts With Other Collision Groups

[Callum_Cloth (not)]

The players mouse cannot detect any part without the collision group “default”. Is there any workaround to this

[ellienonekomimi (ellie)]

The only workaround I know of is raycasting from the camera’s position towards the mouse, otherwise there’s no way to directly change the mouse’s collision group.

[Mokiros]

It is not possible to change the raycast that detects Mouse.Target. It will always use the Default collision group, which means all collision groups that do not collide with it will be ignored. If a collision group is collidable with Default, then it is considered in default raycast.
However, you can do your own raycast by using the Mouse.UnitRay to get origin and direction, then using it in WorldRoot:Raycast() and specifying your own CollisionGroup in RaycastParams:

local ray = Mouse.UnitRay
local distance = 200
local params = RaycastParams.new({}, Enum.RaycastFilterType.Exclude, true, "CollisionGroup", true)
local result = workspace:Raycast(ray.Origin, ray.Direction * distance, params)
if result then
	local target = result.Instance
	-- use target
end