# Corona 6 Adaptive Solver Bug

**URL:** <https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989>\
**Category:** Issues\
**Created:** [October 30, 2020, 2:10am UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989 "2020-10-30T02:10:55Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![tameplan\_1](https://avatars.discourse-cdn.com/v4/letter/t/dfb087/32.png) [@tameplan\_1](https://forums.chaos.com/u/tameplan_1)\
**Post date:** [October 30, 2020, 2:10am UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989/1 "2020-10-30T02:10:55Z")

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Hello. I’ve got some artifacts in Corona 6, when using the Adaptive Light solver. They appear in the Translucency Pass. When the Adaptive Light solver is off these artifacts disappear. I’m using the new CoronaSky model + Corona Sun with no portals in 3ds max 2019.

 ![Screenshot_2.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/8/a/8a089d9d743c5ffa6b3846f34f69c95f91552d3f.jpeg)  
 ![Screenshot_4.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/e/a/eaf14f87d1d766cafcfc2ef12583b0f5a240eb9b.jpeg)  
 ![Screenshot_110.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/1/9/19b802fb3c382db7ab6bb66039c58a528d3b29b7.jpeg)  
 ![Screenshot_1.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/c/5/c5e214587f88a4821ada7dd98e643bb7dff14717.jpeg)

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**Author:** ![maru](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/maru/32/15975_2.png) [@maru](https://forums.chaos.com/u/maru)\
**Post date:** [October 30, 2020, 4:14pm UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989/2 "2020-10-30T16:14:03Z")

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Hi, that’s interesting. Are you able to share the scene with us? (or a part of it where the issue can be reproduced)

Here is the uploader: [Chaos](https://corona-renderer.com/upload)

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**Author:** ![tameplan\_1](https://avatars.discourse-cdn.com/v4/letter/t/dfb087/32.png) [@tameplan\_1](https://forums.chaos.com/u/tameplan_1)\
**Post date:** [October 30, 2020, 5:38pm UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989/3 "2020-10-30T17:38:46Z")

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> [@maru](#):
>
> Hi, that’s interesting. Are you able to share the scene with us? (or a part of it where the issue can be reproduced)
> 
> Here is the uploader: [Chaos](https://corona-renderer.com/upload)

Sure. I have uploaded the scene using Dropbox. Its name is “Zamostyanska\_BUG”.

If it helps: I also have noticed, that this artifact disappears when all the lights are off or hidden (using command Shift+L). And the artifact changes its form if I hide trees (proxies) outside/

Thank You

 ![Screenshot_67.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/8/2/8288ffb0c524a64675dfb9314e539d9b455190e3.jpeg)  
 ![Screenshot_66.jpg](https://europe1.discourse-cdn.com/chaosprd/original/4X/0/8/5/085ea335d23900b23f14602e26be35555802e71b.jpeg)

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<div class="post-metadata">

**Author:** ![maru](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/maru/32/15975_2.png) [@maru](https://forums.chaos.com/u/maru)\
**Post date:** [November 2, 2020, 1:02pm UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989/4 "2020-11-02T13:02:07Z")

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Successfully reproduced and reported. Right now, the only workaround I am aware of is disabling the adaptive light solver.

(Internal ID=587804573)

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<div class="post-metadata">

**Author:** ![tameplan\_1](https://avatars.discourse-cdn.com/v4/letter/t/dfb087/32.png) [@tameplan\_1](https://forums.chaos.com/u/tameplan_1)\
**Post date:** [November 2, 2020, 2:43pm UTC](https://forums.chaos.com/t/corona-6-adaptive-solver-bug/148989/5 "2020-11-02T14:43:51Z")

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Ok, thank You! Right now I’m disabling it.