1 files changed, 21 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/volumetric_resolve_frag.glsl b/source/blender/draw/engines/eevee/shaders/volumetric_resolve_frag.glsl
new file mode 100644
index 00000000000..0115b2cb99e
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+++ b/source/blender/draw/engines/eevee/shaders/volumetric_resolve_frag.glsl
@@ -0,0 +1,21 @@
+
+/* Based on Frosbite Unified Volumetric.
+ * https://www.ea.com/frostbite/news/physically-based-unified-volumetric-rendering-in-frostbite */
+
+/* Step 4 : Apply final integration on top of the scene color.
+ * Note that we do the blending ourself instead of relying
+ * on hardware blending which would require 2 pass. */
+
+uniform sampler2D inSceneColor;
+uniform sampler2D inSceneDepth;
+
+out vec4 FragColor;
+
+void main()
+{
+	vec2 uvs = gl_FragCoord.xy / vec2(textureSize(inSceneDepth, 0));
+	vec4 scene_color = texture(inSceneColor, uvs);
+	float scene_depth = texture(inSceneDepth, uvs).r;
+
+	FragColor = volumetric_resolve(scene_color, uvs, scene_depth);
+}