If you want to paint the exterior of your Van, choose your floors walls and ceiling textures and colours and use day/night mode you will need to use VAN OPTIONS  

Select SETTINGS from the vanspace 3D toolbar


Once in Van Options you can 

a) Use the Colour Wheel to paint the exterior of your van 

b) Select Day or Night mode or stages in between using the toggle 

c) Custom your floor, walls and ceilings textures and colours using the drop downs and then choosing your texture in the Van Interior Menu box