registry MOSH

Vignette · 070

capabilities open MOSH

Code-native visual signature / Atmosphere

vignette

Vignette

Cinematic edge darkening with optional color.

Category: Atmosphere
Parameters: 2
Registry no.: 070 / 143

Run Vignette 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)	0.6
Size	`size`	0.25..0.95	0.62

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": "vignette", "params": { "amount": 0.6, "size": 0.62 } }

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(){ vec4 c = texture2D(uTex, vUv); float d = distance(vUv, vec2(0.5)); // Max size capped at 0.95: the corners of a UV square are only 0.707 from // centre, so a size of 1.5 put the entire falloff outside the frame and the // vignette silently did nothing. float v = smoothstep(uSize, uSize*0.35, d); gl_FragColor = vec4(c.rgb * mix(1.0, v, uAmount), c.a); }

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Other Atmosphere effects

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