A furnished prison environment with separate area prefabs, reusable props and hinged door models, prepared for the Universal Render Pipeline.Tested with Unity 6000.3.18f1 and URP 17.3.0. Requires Unity Registry package com.unity.render-pipelines.universal 17.3.0 and an active URP pipeline. Optional sample pipeline and renderer assets are included. URP/Lit materials use flat-colour swatches. No Asset Store dependency. Built-in, HDRP and older Unity/URP versions are unverified.Build a prison setting around an assembled site with a three-storey cellblock, exercise yard, service rooms, an old masonry wing, administration and perimeter watchtowers. Furnished interiors include a mess hall, kitchen, infirmary, workshop and supporting rooms, with equipment, signs and small environmental details.Start with the complete prison prefab, inspect the separate environment sections, or place reusable props and doors in your own scene. Three demonstration scenes show the full site, a roof-hidden cutaway and a gallery of the prop and door variants. An editable inspection camera offers preset views and optional free flight.Area assemblies preserve this prison's floor plan. They are intended for arranging and adapting the included environment, rather than building arbitrary layouts from a grid-based wall and floor kit. Door models have hinge origins for your own animation or interaction setup.The visual style uses flat colours. The large environment is intended for desktop development; no authored LODs, streaming system or mobile performance certification is included. Collision boxes are approximate and should be tailored to your gameplay. Characters, missions, combat, door interaction or animation systems, audio and navigation data are not included.Requires the Universal Render Pipeline. Prepared and tested in Unity 6000.3.18f1 with URP 17.3.0. No paid shader or other Asset Store product is required. Built-in, HDRP and older Unity versions have not been verified for this release.Environmental sign lettering was converted from Blender's built-in Bfont. The package includes Third-Party Notices and the accompanying Bitstream Vera and Arev notices under Documentation/Licenses. No external font binary is included.Included content• 91 FBX model containers: 50 area assemblies, 20 prop variants and 21 door/gate variants.• 92 prefabs: one assembled environment and a prefab for each model container.• 875 distinct imported mesh subassets.• Separate assembly prefabs range from 44 to 87,284 placed triangles. The complete environment contains 1,043,408 placed triangles.• 967,700 triangles across distinct meshes; 1,043,408 triangles across all visible placed environment instances.• 1,933,833 imported unique mesh vertices. Per-prefab mesh counts, triangles and dimensions are listed in Asset_Inventory.csv.• Approximately 148 × 140 metres, with a maximum height of 16.79 metres.• 40 URP/Lit materials and 40 lossless 4 × 4 PNG flat-colour albedo swatches. Metallic, smoothness and emission are material settings; separate PBR image maps are not supplied.• UV0 for material use and generated UV2 for lightmapping.• Metre scale and normalized prefab roots; bottom-centre origins for area/prop assemblies and hinge origins for doors.• Static architectural MeshColliders and fitted per-mesh BoxColliders for props and doors.• Three demo scenes: Demo_Prison, Demo_Cutaway and Demo_PropGallery.• Namespaced, editable inspection-camera script with preset tours and free flight.• Offline user guide, inventory and editable Blender 5.2 master in a named source ZIP.Rigging: none. Authored animations: none. LODs: none.Required Unity Registry dependency: com.unity.render-pipelines.universal 17.3.0.Tested editor: Unity 6000.3.18f1. Supported render pipeline for this release: URP.claude helps me creating the models
