Update README.md

README.md

@@ -39,6 +39,7 @@ Tips and Tricks
 * By default the script will delete all objects starting with `Spaceship` before generating a new spaceship. To disable this feature, remove or comment out the call to `reset_scene()` around line 735 in the main function.
 * You can provide a seed to the `generate_spaceship()` function to always generate the same spaceship. For example, `generate_spaceship('michael')`.
 * The `generate_spaceship()` function takes many more parameters that affect the generation process. Try playing with them!
+* You can replace the textures with your own ones. All textures are applied using global-space cube UVs. `hull_normal.png` is a normal map that adds extra surface "greebles". `hull_lights_diffuse.png` is an additive diffuse texture to set the color of the window lights. `hull_lights_emit.png` is an emissive texture to make the windows glow in darkness.
 
 Credits
 -------