A game mode that allows you to set up a group of assets ( buildings, belts, poles, splitters) etc. These assets would be placed in a 3D grid environment where the locations and positions could be saved. These building modules would then fit perfectly on the foundations grid and could be placed as one module. This would allow for complex modular factory construction without all the repetitive building and dismantling due to a lack of in game snap enabled grid. Large and long conveyor bus systems could be designed and then easily built in the game world unlike currently. This could be created using a limited version of the game and just saving the connected objects and there locations as a user defined object collection placeable in the game environment. This has the added benefit of giving the user a total build cost of the modules as well.