Concrete Retaining Cube

Concrete Retaining Cube adds modular one-tile weathered concrete blocks that use the terrain-retaining behavior of the original Captain of Industry retaining walls.

The blocks can be placed beside each other or stacked vertically to create retaining structures, foundations, platforms, stairs, ramps, elevated roads, industrial embankments, and custom terrain architecture.

The mod also includes three connecting ramp segments and several safety-railing configurations.

Features

• Stackable 1 × 1 × 1 weathered concrete retaining blocks
• One-tile footprint
• Placement beside other blocks or vertically in stacks
• Uses the vanilla retaining-wall terrain constraints
• Stabilizes surrounding terrain vertices like a retaining wall
• Standard vanilla construction process
• Standard vanilla deconstruction process
• Construction vehicles deliver the required materials
• Finished blocks provide vehicle-compatible upper surfaces
• Stacked blocks expose the highest completed surface for vehicle navigation
• Unfinished blocks remain blocked during construction
• Three ramp segments forming a complete one-block elevation
• Four modular safety-railing configurations
• Dedicated in-game icons for every visible variant
• Weathered matte concrete materials
• Dark mustard-yellow industrial safety railings
• Located in the vanilla **Terraforming** construction category
• Unlocked through the original **Retaining Walls** research
• Legacy prototypes retained invisibly for save compatibility

Included variants

Weathered concrete retaining cube

The standard flat block provides a complete vehicle-compatible upper surface.

It can be used for:

• retaining structures
• foundations
• raised platforms
• elevated roads
• harbour construction
• industrial terraces
• decorative concrete architecture

Straight railing

A flat weathered cube with a centered straight safety railing.

Corner railing

A flat weathered cube with a centered 90-degree railing corner.

Railing end

A flat weathered cube with a terminating half-length railing section.

T railing

A flat weathered cube with a centered T-shaped railing junction.

Ramp cube 1/3

The first ramp segment rises from 0% to 33% of one block.

Ramp cube 2/3

The second ramp segment rises from 33% to 66% of one block.

Ramp cube 3/3

The final ramp segment rises from 66% to 100% of one block.

When the three ramp segments are placed in the correct order and orientation, they create a continuous vehicle-compatible transition to the top of a full-height concrete block.

Construction cost

Every block or ramp segment requires:

• 2 Concrete Slabs
• 1 Iron

The blocks use the normal Captain of Industry construction and deconstruction workflow. Materials must be delivered by construction vehicles before the structure is completed.

Vehicle surfaces

Completed flat blocks provide a vehicle-compatible surface across their upper face.

The ramp variants provide progressively elevated vehicle surfaces:

• 0–33%
• 33–66%
• 66–100%

The surfaces use the game's vehicle-surface and clearance systems. Blocks must be completed and correctly connected before vehicles can use the resulting platform or ramp.

When multiple blocks are stacked, the mod exposes the highest completed surface instead of treating every block inside the stack as a separate road level.

Terrain retaining behavior

Each block uses the same terrain-physics restriction used by vanilla retaining walls on its four surrounding terrain vertices.

This allows the cubes to support terrain and create more flexible retaining structures than the original long wall segments.

The blocks do not replace normal terrain preparation. Large structures still require suitable support, correct placement, and properly connected surfaces.

Research and construction menu

Concrete Retaining Cube is unlocked by the original **Retaining Walls** research.

Its two selectable families appear in the vanilla **Terraforming** category:

• weathered cubes and railing variants
• three ramp segments

The variants are grouped through the normal in-game upgrade selection instead of adding additional top-level toolbar categories.

Compatibility and saves

Concrete Retaining Cube version 0.4.15 is verified for Captain of Industry 0.8.6.

The mod can be added to an existing save.

Older prototype identifiers are retained as hidden compatibility entries so structures created by earlier mod versions can continue loading.

Do not remove the mod from a save containing any of its blocks or ramps. The mod is not marked as safely removable because the constructed entities are stored in the save.

Feedback

Thank you for downloading and testing Concrete Retaining Cube.

Bug reports and detailed feedback are welcome. When reporting a problem, please include:

• game version
• mod version
• relevant screenshots
• selected block or ramp variant
• structure height and arrangement
• vehicle type involved
• game log if available

Please use my Coffee page for reporting because I am not always active online and cannot monitor every platform. Thank you for understanding.

Thank you for your support

Thank you to everyone who uses the mod, reports problems, and helps improve it.

If Concrete Retaining Cube gives you more freedom when constructing your island and you would like to support further development, you can use either option below:

☕ [Buy Me a Coffee](https://buymeacoffee.com/sirael)

🏦 **Bank transfer / IBAN:** `BE94 9673 0415 8014`

Support is entirely voluntary. Every contribution is sincerely appreciated and helps fund continued development, testing, localization, and future mods.

**Created by Sirael**

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If I made any mistakes while publishing the mod here, please let me know. I would like to fix them as quickly as possible.