modify only the rug in the scene change its shape from rounded corners to a perfect rectangle with sharp 90 degree corners the rug must have clean straight edges with clearly defined right angles no curvature or soft rounding at any corner set the rug color to a light grey tone keep the same size position material texture lighting and shadows ensure the rug still sits naturally on the floor and interacts realistically with light do not alter any other objects furniture or composition in the image absolutely no rounded edges no soft corners strictly geometric rectangular shape
