Enclose rainwater tanks in a shipping-container module

docs/PROJECT-CONTEXT.md

@@ -2,11 +2,11 @@
 
 This is Marcus Rehbock's long-term personal homestead design project. The aim is to refine the design over several years, choose a real site, add survey and LiDAR information, coordinate construction plans, and eventually create a full Unreal Engine 5 walkthrough. The design is a working concept, not an approved or engineered building proposal.
 
-## Current state: version 004, 10 September 2026
+## Current state: version 005, 10 September 2026
 
-Open `blender/samford-solarpunk-garden-flow-tour.blend` in Blender 5.2.1. This is the current model. It includes the detailed kitchen and bedroom upgrades, a garden-centred arrangement, 13 flowering beds, and a 30-chapter camera tour lasting 2 minutes 30 seconds at 24 fps. The former table-tennis platform and its equipment have been removed. Earlier dated scene files are historical versions.
+Open `blender/samford-solarpunk-container-water-tour.blend` in Blender 5.2.1. This is the current model. It includes the detailed kitchen and bedroom upgrades, a garden-centred arrangement, 13 flowering beds, and a 30-chapter camera tour lasting 2 minutes 30 seconds at 24 fps. The former table-tennis platform and its equipment have been removed. Earlier dated scene files are historical versions.
 
-The latest plan is `plans/concept/garden-flow-plan.svg`. It is generated from the same `garden-flow-layout.json` coordinates used by the Blender revision. Current images are `renders/garden-flow-overview.png`, `garden-court.png`, `flowering-kitchen-garden.png`, `garden-flow-dining.png` and `garden-flow-training.png`.
+The latest plan is `plans/concept/container-water-plan.svg`. It is generated from the same `container-water-layout.json` coordinates used by the Blender revision. Latest images are `renders/container-water-overview.png`, `container-water.png` and `container-water-cutaway.png`. The preceding garden revision also has courtyard, planting, dining and training detail renders.
 
 ## Philosophy and values
 
@@ -58,13 +58,13 @@ Marcus prefers “warm timber, soft clay walls, selective hemp insulation, stone
 
 ## Energy and homesteading
 
-Keep rooftop solar, a separate ground array (current conceptual footprint centred at 9.4, -19), off-grid energy storage, two dark-green cylindrical rainwater tanks, greenhouse, six raised vegetable beds, fruit trees and garden harvest bench. Product capacities, structural design, solar yield, battery autonomy, water balance, wastewater treatment and food-production targets have not been engineered.
+Keep rooftop solar, a separate ground array (current conceptual footprint centred at 9.4, -19), off-grid energy storage, two sealed rainwater tanks inside a dark-green container-style enclosure, greenhouse, six raised vegetable beds, fruit trees and garden harvest bench. Product capacities, structural design, solar yield, battery autonomy, water balance, wastewater treatment and food-production targets have not been engineered.
 
 ## Blender and Unreal state
 
 Blender has full editable geometry and Cycles materials. Saved render settings are 2560 × 1440 at 100%; web preview renders are made at 60% (1536 × 864). The user previously reported low playback FPS. `00 FAST TOUR - lightweight viewport` is a static simplified display; `DETAIL - full geometry for renders` is disabled only in the viewport. Cycles renders exclude FAST and use DETAIL automatically. For detailed editing, enable DETAIL and disable FAST. After moving or removing geometry, refresh the affected fast copies as well.
 
-The tour contains 30 five-second chapters. Space plays/pauses with the pointer over the 3D view; Shift+Left Arrow returns to frame 1. The current scene opens at the overview. Update camera positions and captions whenever a subject moves.
+The tour contains 30 five-second chapters. Space plays/pauses with the pointer over the 3D view; Shift+Left Arrow returns to frame 1. The current scene opens at chapter 13, container rainwater storage. Update camera positions and captions whenever a subject moves.
 
 The **actual Unreal work covers only the meditation room**. `unreal/SamfordMeditation/SamfordMeditation.uproject` is the UE 5.8.2 project, with room geometry, materials, light and camera. It is not a complete Unreal homestead. FBX/GLB exports and textures are retained. Camera animation instructions are in `walkthroughs/UNREAL-CAMERA-ANIMATION.md`. A complete interactive home/site walkthrough remains future work.
 
@@ -75,3 +75,7 @@ Public repository: https://git.rehbock.xyz/marcus/samford-valley-home . Server w
 The repository includes Blender models, renders, plans, design context, revision records, source scripts, Unreal assets and reserved folders for survey/LiDAR/construction information. Dated compressed snapshots remain in the server archive and are excluded from Git to avoid duplicating the entire repository in each commit. Git LFS is disabled on the existing Gitea installation; current assets are stored as ordinary Git binaries. Plan large-file/object storage before adding multi-gigabyte LiDAR or video datasets. No new off-site backup service has been configured.
 
 Read `REQUEST-HISTORY.md`, the decisions folder and `AGENTS.md` before making further changes. Do not mistake historical renders or earlier briefs for the current approved layout.
+
+## Version 005 water module
+
+Marcus requested that the water tanks become a shipping container. The visible module is a roughly 20-foot corrugated-steel container at (-25, -8), 6.06 × 2.44 × 2.59 m. Two separate sealed tanks fit inside; the steel shell is an enclosure, not the water-retaining vessel. The cargo doors are at the east end and the west end is a transparent inspection cutaway. Plumbing is kept off the door faces, and the service path approaches the east end. Current renders: container-water.png, container-water-overview.png and container-water-cutaway.png. Exact tank products/capacities, water quality treatment, hydraulic sizing and container support design are not resolved by the concept model.