For complete workflow compatibility, we recommend downloading the source format.The converted file is intended exclusively for browser preview. In the source file, the following are fully preserved:✔ original scene hierarchy✔ complete materials without reduction✔ proper texture maps✔ correct object namesIf you intend to use the asset in a production environment, select the Original format.Double hung window features two sashes that slide vertically within the frame allowing both the top and bottom panes to be opened or closed independently. Constraints have been added to the Top Frame and Bottom Frame to restrict movement along the Z axis. When placing the window in a wall select the Double Hung Window empty and align it to the outside wall. Create a boolean modifier on the wall object and select the Cutter object for the boolean operation in the modifier.