# Why do AO and LightMap need a second set of UVs?

**URL:** https://discourse.threejs.org/t/why-do-ao-and-lightmap-need-a-second-set-of-uvs/4178
**Category:** Questions
**Tags:** lightmap, uv-mapping
**Created:** [September 18, 2018, 7:01pm UTC](https://discourse.threejs.org/t/why-do-ao-and-lightmap-need-a-second-set-of-uvs/4178 "2018-09-18T19:01:16Z")
**Posts on this page:** 1
**Showing post:** 8

<div class="post-metadata">

### Author: ![pailhead](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/pailhead/32/85_2.png) [@pailhead](https://discourse.threejs.org/u/pailhead)
#### Post date: [September 19, 2018, 6:32pm UTC](https://discourse.threejs.org/t/why-do-ao-and-lightmap-need-a-second-set-of-uvs/4178/8 "2018-09-19T18:32:48Z")

</div>

Yes, often there are better ways to say what i mean 🙂 It’s the people skills I lack, and i’m only improving my 3d. Thanks @donmccurdy. Having contributed myself to three.js and knowing many contributors i don’t think ever took a jab at contributors.

---

_[View the full topic](https://discourse.threejs.org/t/why-do-ao-and-lightmap-need-a-second-set-of-uvs/4178)._