Update Files

leenkx/Shaders/motion_blur_veloc_pass/motion_blur_veloc_pass.frag.glsl

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+// Per-Object Motion Blur
+// http://john-chapman-graphics.blogspot.com/2013/01/per-object-motion-blur.html
+#version 450
+
+#include "compiled.inc"
+
+uniform sampler2D sveloc;
+uniform sampler2D tex;
+// uniform vec2 texStep;
+uniform float frameScale;
+
+in vec2 texCoord;
+out vec4 fragColor;
+
+void main() {
+	vec2 velocity = textureLod(sveloc, texCoord, 0.0).rg * motionBlurIntensity * frameScale;
+
+	#ifdef _InvY
+	velocity.y = -velocity.y;
+	#endif
+
+	fragColor.rgb = textureLod(tex, texCoord, 0.0).rgb;
+
+	// float speed = length(velocity / texStep);
+	// const int MAX_SAMPLES = 8;
+	// int samples = clamp(int(speed), 1, MAX_SAMPLES);
+	const int samples = 8;
+	for (int i = 0; i < samples; ++i) {
+		vec2 offset = velocity * (float(i) / float(samples - 1) - 0.5);
+		fragColor.rgb += textureLod(tex, texCoord + offset, 0.0).rgb;
+	}
+	fragColor.rgb /= float(samples + 1);
+}

leenkx/Shaders/motion_blur_veloc_pass/motion_blur_veloc_pass.json

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+{
+	"contexts": [
+		{
+			"name": "motion_blur_veloc_pass",
+			"depth_write": false,
+			"compare_mode": "always",
+			"cull_mode": "none",
+			"links": [
+				{
+					"name": "frameScale",
+					"link": "_frameScale"
+				},
+				{
+					"name": "texStep",
+					"link": "_screenSizeInv",
+					"ifdef": ["_Disabled"]
+				}
+			],
+			"texture_params": [],
+			"vertex_shader": "../include/pass.vert.glsl",
+			"fragment_shader": "motion_blur_veloc_pass.frag.glsl"
+		}
+	]
+}