medieval wooden post 3d model

Create an ultra-realistic medieval wooden prop for Blender and Roblox Studio export as GLB. The asset must include TWO separate objects that are NOT merged. IMPORTANT: the vertical wooden post and the wooden sign plank MUST be completely separate meshes (not joined), with a small realistic mounting gap so they can be edited independently. The vertical post is a square prism-shaped log, tall and sturdy, made of aged medieval wood with deep grain, cracks, knots, splits, chipped corners, moss, dirt, humidity stains, and strong weathering. The sign plank is a rectangular wooden board (parallelepiped), same wood tone but clearly a crafted sign, with visible grain, slight warping, scratches, rough edges, and subtle medieval carved details. Use iron nails, brackets, rope bindings as connection details but keep meshes separate (no merging). PBR materials, realistic roughness, AO, cinematic medieval fantasy style, AAA quality, Roblox optimized topology, clean UVs, centered pivots, export-r