# How do I control the sun disc size when using Sky Atmosphere?

**URL:** <https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723>\
**Category:** Rendering\
**Tags:** sun, unreal-engine, question\
**Created:** [June 14, 2020, 12:32pm UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723 "2020-06-14T12:32:28Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![anonymous\_user\_fd73624c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_fd73624c1](https://forums.unrealengine.com/u/anonymous_user_fd73624c1)\
**Post date:** [June 14, 2020, 12:32pm UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723/1 "2020-06-14T12:32:28Z")

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Hello!

I just downloaded UE 4.25 and started playing around with Sky Atmosphere. When comparing the TimeOfDay\_Default level with the Unreal documentation and my own machine I noticed that my sun disk is tiny compared to the documentation screenshots and videos. Dose anyone one know why that is and how can I control the sun disc size?

Thank you in advance!

 ![304407-unrealdoc.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/b/0/4b04fe97a5c233d68c9b1fdbe109ab1972e26063.png)

 ![304408-mymachine.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/d/d/4/dd4ed003d9e2fff0ac8ea340373d9daddd98185f.jpeg)

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**Author:** ![anonymous\_user\_fd73624c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_fd73624c1](https://forums.unrealengine.com/u/anonymous_user_fd73624c1)\
**Post date:** [July 5, 2020, 10:42am UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723/2 "2020-07-05T10:42:22Z")

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I think I accidentally found the answer to my own question. When I play around with the **source angle** on the **directional light** in my scene the sun disc changes size.

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**Author:** ![ThePinkfox](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ThePinkfox](https://forums.unrealengine.com/u/ThePinkfox)\
**Post date:** [August 13, 2020, 2:29am UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723/3 "2020-08-13T02:29:55Z")

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The Source Angle you talked about it in direction light will change the disk size, but if you’re looking for the soft edges like that it’s more likely that Bloom in the Post Process Volume is disabled.

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**Author:** ![anonymous\_user\_fd73624c1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_fd73624c1](https://forums.unrealengine.com/u/anonymous_user_fd73624c1)\
**Post date:** [August 13, 2020, 7:16am UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723/4 "2020-08-13T07:16:42Z")

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Thank you for the further context! 🙂

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**Author:** ![Amelia\_P](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Amelia\_P](https://forums.unrealengine.com/u/Amelia_P)\
**Post date:** [January 24, 2023, 7:55pm UTC](https://forums.unrealengine.com/t/how-do-i-control-the-sun-disc-size-when-using-sky-atmosphere/466723/5 "2023-01-24T19:55:15Z")

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Thanks!