Update Files

leenkx/Shaders/blur_bilat_blend_pass/blur_bilat_blend_pass.frag.glsl

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+// Exclusive to volumetric light for now
+#version 450
+
+#include "compiled.inc"
+
+uniform sampler2D tex;
+uniform vec2 dir;
+uniform vec2 screenSize;
+
+in vec2 texCoord;
+out vec4 fragColor;
+
+const float weight[10] = float[] (0.132572, 0.125472, 0.106373, 0.08078, 0.05495, 0.033482, 0.018275, 0.008934, 0.003912, 0.001535);
+
+float normpdf(float x, float sigma) {
+	return 0.39894 * exp(-0.5 * x * x / (sigma * sigma)) / sigma;
+}
+
+float normpdf3(vec3 v, float sigma) {
+	return 0.39894 * exp(-0.5 * dot(v, v) / (sigma * sigma)) / sigma;
+}
+
+void main() {
+	vec2 step = (dir / screenSize.xy);
+	vec3 colf = textureLod(tex, texCoord, 0.0).rgb * weight[0];
+
+	float col;
+	float res = 0.0;
+	float sumfactor = 0.0;
+	float factor;
+	float f = 1.0 / normpdf(0.0, 1.0);
+
+	for (int i = 1; i < 10; i++) {
+		float fw = f * weight[i];
+		vec2 s = step * (float(i) + 0.5);
+
+		col = textureLod(tex, texCoord + s, 0.0).r;
+		factor = normpdf3(col - colf, 1.0) * fw;
+		sumfactor += factor;
+		res += factor * col;
+
+		col = textureLod(tex, texCoord - s, 0.0).r;
+		factor = normpdf3(col - colf, 1.0) * fw;
+		sumfactor += factor;
+		res += factor * col;
+	}
+
+	res /= sumfactor;
+	fragColor = vec4(volumAirColor * res, 1.0);
+}

leenkx/Shaders/blur_bilat_blend_pass/blur_bilat_blend_pass.json

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+{
+	"contexts": [
+		{
+			"name": "blur_bilat_blend_pass_y",
+			"depth_write": false,
+			"compare_mode": "always",
+			"cull_mode": "none",
+			"blend_source": "blend_one",
+			"blend_destination": "blend_one",
+			"blend_operation": "add",
+			"alpha_blend_source": "blend_one",
+			"alpha_blend_destination": "blend_one",
+			"alpha_blend_operation": "add",
+			"links": [
+				{
+					"name": "dir",
+					"link": "_vec2y"
+				},
+				{
+					"name": "screenSize",
+					"link": "_screenSize"
+				}
+			],
+			"texture_params": [],
+			"vertex_shader": "../include/pass.vert.glsl",
+			"fragment_shader": "blur_bilat_blend_pass.frag.glsl"
+		}
+	]
+}