Subject Delay

Code-native visual signature / Dimensional

subjectDelay

Delayed poses and luminous motion trails around the subject, while the background stays live. Auto detects people or source transparency; motion selection works with other imagery.

Category: Dimensional
Parameters: 6
Registry no.: 001 / 143

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What it reads

Delay simulation Carries a private fixed-step GPU field the renderer advances for it, which is state no single frame contains.
Has modes At least one parameter switches between named modes rather than sweeping a range.

Parameters

param	key	range	default
Amount	`amount`	0..1 (rendered to 2)	0.4
Trail seconds	`delay`	0..1.5	0.6
Delayed poses	`echoes`	1..4	3
Trail fade	`fade`	0..1	0.45
Soft edges	`feather`	0..1	0.2
Subject selection	`selection`	0..4	0

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": "subjectDelay", "params": { "amount": 0.4, "delay": 0.6, "echoes": 3, "fade": 0.45, "feather": 0.2, "selection": 0 } }

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 base=texture2D(uTex,vUv); vec4 trail=texture2D(uDelayTex,vUv); // premultiplied, with each pose's own silhouette float m=clamp(uAmount,0.0,1.0); if(m<=0.0||trail.a<=0.0){gl_FragColor=base;return;} trail*=m; float alpha=trail.a+base.a*(1.0-trail.a); vec3 rgb=(trail.rgb+base.rgb*base.a*(1.0-trail.a))/max(alpha,.00001); gl_FragColor=vec4(rgb,alpha); }

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Other Dimensional effects

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