yes

vulkan/draw/VertexFetchInstanceIndex.vert

@@ -0,0 +1,19 @@
+#version 430
+
+layout(location = 0) in vec4 in_position;
+layout(location = 1) in vec4 in_color;
+layout(location = 2) in int in_refInstanceIndex;
+
+layout(location = 0) out vec4 out_color;
+
+out gl_PerVertex {
+    vec4 gl_Position;
+};
+
+void main() {
+	gl_Position = in_position;
+	if (gl_InstanceIndex == in_refInstanceIndex)
+		out_color = in_color;
+	else
+		out_color = vec4(1.0, 0.0, 0.0, 1.0);
+}