yes

vulkan/draw/VertexFetchInstancedFirstInstance.vert

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+#version 430
+
+layout(location = 0) in vec4 in_position;
+layout(location = 1) in vec4 in_color;
+layout(location = 2) in int in_refVertexIndex;
+
+layout(location = 0) out vec4 out_color;
+
+out gl_PerVertex {
+    vec4 gl_Position;
+};
+
+void main() {
+	vec2 perVertex = vec2(in_position.x, in_position.y);
+	vec2 perInstance[6]	= vec2[6](vec2(0.7, -0.7), vec2(-0.75, 0.8), vec2(0.0, 0.0), vec2(0.3, 0.0), vec2(0.0, -0.3),vec2(0.3, -0.3) );
+
+	gl_Position = vec4(perVertex + perInstance[gl_InstanceIndex], 0.0, 1.0);
+
+	if (gl_VertexIndex == in_refVertexIndex)
+		out_color = in_color;
+	else
+		out_color = vec4(1.0, 0.0, 0.0, 1.0);
+}