perform a texture overlay only on the selected masked surface do not generate a new image do not re render the room do not redesign the scene do not reinterpret the interior use the original image as the locked base image apply the provided fabric sample only as a flat texture overlay on the selected ceiling wall surface everything outside the selected mask must remain completely unchanged do not change image dimensions aspect ratio resolution camera angle perspective framing lighting shadows furniture sofa coffee table cabinets behind the sofa wood paneling bed headboard floor ceiling lights vents trims decorative objects architectural details the sofa must remain exactly the same the coffee table in front of the sofa must remain exactly the same and fully visible the cabinets behind the sofa must remain exactly the same no object should be moved removed added reshaped resized or regenerated do not modify any pixels outside the selected mask the selected ceiling wall surface must keep the same shape the same geometry the same slope the same seams the same edges the same panel divisions the same lights and vents only replace the visible material texture on the selected surface the fabric should appear as a realistic surface texture with correct scale correct orientation subtle texture natural shadows and photorealistic blending if the edit requires changing the room furniture camera dimensions sofa coffee table or cabinets then leave the image unchanged texture overlay only masked area only no scene regeneration no object changes no camera changes no cropping