# How do I fix a check map Error (Lighting category)

**URL:** <https://forums.unrealengine.com/t/how-do-i-fix-a-check-map-error-lighting-category/481282>\
**Category:** Rendering\
**Tags:** error, unreal-engine, question, map-error\
**Created:** [April 2, 2021, 5:51pm UTC](https://forums.unrealengine.com/t/how-do-i-fix-a-check-map-error-lighting-category/481282 "2021-04-02T17:51:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Grimmzjr](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Grimmzjr](https://forums.unrealengine.com/u/Grimmzjr)\
**Post date:** [April 2, 2021, 5:51pm UTC](https://forums.unrealengine.com/t/how-do-i-fix-a-check-map-error-lighting-category/481282/1 "2021-04-02T17:51:20Z")

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Hello guys!  
I am currently working on a ArchViz-Scene and at he moment Im trying to get the best and most realisticest Lighting Results. So when i pressed the build button, there are like 60 Errors for 60 assets with the information: “invalid draw scale” ( in the Check map category). Every asset in the scene has the same error cause so yeah. It also says the drawscale is 0 (NULL) and I dont know how to increase this Value. I´d be so delighted if you could help me! PS: I dont have problems with the UV overlapping and stuff.  
Kind Regards,  
Dan aka Grimmzjr.

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**Author:** ![ClockworkOcean](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/clockworkocean/32/1169999_2.png) [@ClockworkOcean](https://forums.unrealengine.com/u/ClockworkOcean)\
**Post date:** [April 2, 2021, 6:12pm UTC](https://forums.unrealengine.com/t/how-do-i-fix-a-check-map-error-lighting-category/481282/2 "2021-04-02T18:12:18Z")

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It sounds like some of your meshes are zero in size.