SpecialMesh to MeshPart conversion issue

[index_self]

Use InsertService:CreateMeshPartAsync with MeshPart:ApplyMesh. You might have to reset a few properties after you apply the mesh, such as the texture.

local InsertService = game:GetService("InsertService")

local function ChangeMeshId(Part: MeshPart, MeshId: string): boolean
	local Success, LoadedMesh = pcall(
		InsertService.CreateMeshPartAsync, InsertService,
		MeshId, Part.CollisionFidelity, Part.RenderFidelity
	)
	
	if Success then
		Part:ApplyMesh(LoadedMesh)
		return true
	end
	
	return false
end