Create a classic Roblox-ready 3D doorway/frame centerpiece in Default style for Returnbound: a way out that looks assembled from remembered traces, target size 8.00 x 9.50 x 1.00 studs with a clear central opening at least 4.00 x 6.50 studs, 4,000 to 7,000 polygons preferred and never above 10,000, chunky old frame pieces, simple blocky bevels, subtle blue and faded gold light seams, readable central opening, hopeful but haunted, not a sci-fi portal, not a full lore monument, no text