Tree collisions and highlights

outline.gdshader

@@ -0,0 +1,13 @@
+shader_type spatial;
+render_mode cull_front, unshaded;
+
+uniform vec3 color : source_color = vec3(0,0,0);
+uniform float thickness : hint_range(0.0, 1.0, 0.01) = 0.03;
+
+void vertex() {
+	VERTEX += thickness*NORMAL;
+}
+
+void fragment() {
+	ALBEDO = color;
+}