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Glowing Fish Quarter-Resolution Rendering

How fish lighting reduces pixel and VRAM cost for modern GPUs.

Quick answer: Each fish’s warm glow is rendered to a separate texture at one-quarter resolution, reducing rendered pixels and VRAM use while preserving the visual effect.

How to use this information

Performance tests should compare water scenes with different shoal sizes at a fixed resolution. Capture GPU load, VRAM allocation and frame time, then distinguish the glow technique from the cost of fish AI and geometry.

Official evidence

Hundreds of individually simulated glowing fish created a rendering challenge. The developer’s solution draws their light into a lower-resolution screen texture instead of paying full-resolution cost for every glowing individual.

What the confirmed data means

The approach targets a dense, readable cyberpunk effect. It explains why the glow can remain visible at scale and why a fish-heavy scene is relevant when evaluating GPU performance.

Publication boundary

Quarter resolution describes one lighting texture, not the entire game resolution. It does not imply blurry output or guarantee a specific FPS improvement.

Related guides

Physical Fish SimulationWhy the fish you see is the same individual you can catch.Fish Shoal and Bait BehaviorHow hundreds of simulated fish follow other fish or the player’s bait.Fishing SimulationPhysical fish, shoal behavior and the rendering method behind the glowing catch system.

Sources and verification

ION LANDS development update · Official Steam listing

Last reviewed: July 26, 2026 · Independent, unofficial player guide.