# Is it possible to setup the lightmap coordonate index with blueprint or Dataprep?

**URL:** <https://forums.unrealengine.com/t/is-it-possible-to-setup-the-lightmap-coordonate-index-with-blueprint-or-dataprep/1212555>\
**Category:** Programming & Scripting\
**Tags:** Dataprep, unreal-engine, Blueprint, question\
**Created:** [June 27, 2023, 4:56pm UTC](https://forums.unrealengine.com/t/is-it-possible-to-setup-the-lightmap-coordonate-index-with-blueprint-or-dataprep/1212555 "2023-06-27T16:56:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DevWipon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DevWipon](https://forums.unrealengine.com/u/DevWipon)\
**Post date:** [June 27, 2023, 4:56pm UTC](https://forums.unrealengine.com/t/is-it-possible-to-setup-the-lightmap-coordonate-index-with-blueprint-or-dataprep/1212555/1 "2023-06-27T16:56:40Z")

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Hello

In my project i use a glb in which objects have two or three uv sets. I want to use the last uv set as lightmap coordonate index. If i use dataprep, i need to create an operator, but i’m not able to cast the _element Object reference_ to the _datasmith mesh element_ needed by the lightmap coordonate index. Is it possible? Or does another solution exist to do this with an editor Utilities or something else?

Thank you