Example shaders

shaders/temporal-echo/shader.json

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+{
+  "id": "temporal-echo",
+  "name": "Temporal Echo",
+  "description": "Blends multiple older pre-layer frames with decay and tint for configurable motion echoes.",
+  "category": "Temporal",
+  "entryPoint": "shadeVideo",
+  "temporal": {
+    "enabled": true,
+    "historySource": "preLayerInput",
+    "historyLength": 12
+  },
+  "parameters": [
+    {
+      "id": "echoAmount",
+      "label": "Echo Amount",
+      "type": "float",
+      "default": 0.55,
+      "min": 0.0,
+      "max": 1.0,
+      "step": 0.01
+    },
+    {
+      "id": "decay",
+      "label": "Decay",
+      "type": "float",
+      "default": 0.72,
+      "min": 0.0,
+      "max": 1.0,
+      "step": 0.01
+    },
+    {
+      "id": "frameStride",
+      "label": "Frame Stride",
+      "type": "float",
+      "default": 2.0,
+      "min": 1.0,
+      "max": 6.0,
+      "step": 1.0
+    },
+    {
+      "id": "echoTint",
+      "label": "Echo Tint",
+      "type": "color",
+      "default": [0.65, 0.85, 1.0, 1.0]
+    }
+  ]
+}

shaders/temporal-echo/shader.slang

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+float4 shadeVideo(ShaderContext context)
+{
+	int stride = int(clamp(frameStride, 1.0, 6.0) + 0.5);
+	float3 echo = float3(0.0, 0.0, 0.0);
+	float total = 0.0;
+	float weight = 1.0;
+
+	for (int i = 1; i <= 6; ++i)
+	{
+		int frame = i * stride;
+		float3 sampleColor = sampleTemporalHistory(frame, context.uv).rgb * echoTint.rgb;
+		echo += sampleColor * weight;
+		total += weight;
+		weight *= saturate(decay);
+	}
+
+	float3 echoColor = echo / max(total, 0.0001);
+	float amount = saturate(echoAmount) * echoTint.a;
+	return float4(lerp(context.sourceColor.rgb, echoColor, amount), context.sourceColor.a);
+}