registry MOSH

Caustic Water · 097

capabilities open MOSH

Code-native visual signature / Atmosphere

causticWater

Caustic Water

Shimmering light refractions as if viewed through a sunlit water surface.

Category: Atmosphere
Parameters: 3
Registry no.: 097 / 143

Run Caustic Water in the browser

What it reads

Frame-local Reads only the current frame, which makes it the cheapest kind to stack and safe to render into a Conjure window at any size.

Parameters

param	key	range	default
Amount	`amount`	0..1 (rendered to 2)	0.65
Scale	`scale`	1..16	5
Speed	`speed`	0..4	1.2

The renderer widens amount past its declared maximum by 2× before it reaches the shader, because most shader bodies were tuned against a muted top end. The rendered figure is the bound that actually arrives.

Defaults as a layer

{ "effectId": "causticWater", "params": { "amount": 0.65, "scale": 5, "speed": 1.2 } }

GLSL fragment shader

The effect's own code. The uniforms and helpers above it — uTex, uFeedback, the depth proxy, the frame ring, depthAt(), timeAt() — are the same header every Ether-MOSH shader opens with, and are documented once on the registry rather than reprinted on all 143 pages.

void main(){ float t = uTime * uSpeed * 0.5; vec2 p = vUv * uScale; float n1 = noise(p + vec2(t * 0.9, t * 0.7)); float n2 = noise(p * 1.4 - vec2(t * 0.6, t * 0.85)); float n3 = noise(p * 0.65 + vec2(t * 0.45, -t * 0.6)); float caustic = n1 * n2 * n3; caustic = pow(clamp(caustic * 3.0, 0.0, 1.0), 1.2); vec2 refr = vec2(n1 - 0.5, n2 - 0.5) * uAmount * 0.05; vec4 c = texture2D(uTex, vUv + refr); vec3 lightColor = mix(vec3(0.25, 0.55, 1.0), vec3(1.0, 0.97, 0.92), caustic); gl_FragColor = vec4(c.rgb + lightColor * caustic * uAmount * 1.6, c.a); }

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Other Atmosphere effects

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