IRLights BBS Addon
by qualet
IRLights BBS Addon brings real-time point lights, spotlights and shadows to BBS model blocks and actors in film replays, and the mod is open source.
What it does
Lights are placed the same way other BBS form slots are, so the existing BBS workflow carries over. Each light offers per-light control over color, intensity, range or radius, cone angle with inner and outer values, bulb size and shadow softness. Shadows can be toggled per light, with quality settings from Low to Ultra, and a cache means the scene is only re-baked when something changes. Volumetric lighting adds beams with configurable strength, density, anisotropy using Henyey-Greenstein scattering, and god-rays through fog, smoke and dust.
IRLights BBS Addon is a client-side only mod, so only the client needs it and servers run without it. It is made for Fabric and is also published for Forge and NeoForge, with builds covering 1.20.1 – 1.21.11. The mod depends on BBS FS and Fabric API. Iris Shaders is optional, and the code is under the MIT License.
Key features
Point lights and spotlights
Real-time point lights and spotlights illuminate BBS model blocks and actors while a scene plays.
Shadows for world and entities
Real-time shadows are cast by both world blocks and entities, with softness set for each light.
Volumetric beams
Beams with configurable density and scattering show god-rays through fog and dust, plus projected light patterns through gobo cookies.
In-world light guides
Optional wireframe gizmos show where each light sits and how far it reaches, which helps when editing a scene.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Optional 1
Use cases
Lighting animated scenes
Spotlights and point lights can be attached to BBS model blocks so they move with the actors in a replay.
Who it’s for: Animators and filmmakers who build scenes in BBS and want lighting that matches the rest of the replay. The mod suits players who already work with BBS form slots.
How it compares
BBS REFORGE is a Fabric-only option for 1.21.1 under the MIT License and is open source. BBS CML is open source under the MIT License and covers 1.20.1 – 26.1.2 on Fabric, Forge and NeoForge. BBS mod is not open source, is published under All rights reserved and covers 1.12.2 – 26.3, with the client required and the server optional.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| IRLights BBS Addon | Fabric, Forge and NeoForge | 1.20.1 – 1.21.11 | Client-side only | 2026-09-21 |
| BBS REFORGE | Fabric | 1.21.1 | Client required, server optional | 2025-12-05 |
| BBS CML | Fabric, Forge and NeoForge | 1.20.1 – 26.1.2 | Client required, server optional | 2026-10-10 |
| BBS mod | Fabric, Forge and NeoForge | 1.12.2 – 26.3 | Client required, server optional | 2026-10-14 |
Questions
Does IRLights BBS Addon need Iris Shaders?
Which dependencies does IRLights BBS Addon require?
Does the 1.20.1 build work on Forge or NeoForge?
In the catalog
IRLights BBS Addon is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
It's made for Fabric 1.20.1-1.21.11. However, 1.20.1 build can be used on Forge and NeoForge (1.21.1) with Sinytra Connector mod This addon adds real dynamic point lights and spotlights to BBS model blocks, actors, and film replays. It comes with real-time shadows, volumetric god-rays, and projected light patterns…
Official listing
- Modrinth page
- modrinth.com/mod/irlights-bbs-addon
- Owner
- qualet
- Published
- 2026-07-23
- Updated on Modrinth
- 2026-09-21
- Facts verified
- 2026-10-15