# UE 4.20 occlusion integration does not work **URL:** \ **Category:** Unreal Engine\ **Created:** [October 25, 2018, 3:23pm UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162 "2018-10-25T15:23:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![snajmiec](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@snajmiec](https://qa.fmod.com/u/snajmiec)\ **Post date:** [October 25, 2018, 3:23pm UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/1 "2018-10-25T15:23:14Z")
Hello everyone! I am using Unreal 4.20.3 along with proper version of FMOD plugin on Windows 10. I tried to implement occlusion (as described in here [https://www.fmod.com/resources/documentation-api?page=content/generated/engine\_ue4/occlusion.html#/](https://www.fmod.com/resources/documentation-api?page=content/generated/engine_ue4/occlusion.html#/)) in my project to no avail. Collision simply does not change parameter in FMOD event. I did set up in Fmod Studio event’s user properiets “Occlusion” “1” and added proper filter on master track. Also, I had tried adding parameter Occlusuion and used it to automate low pass of filter. In this case audio from the event had been muffled all the time, it hadn’t matter if collision happend. Same method worked perfectly when working with UE 4.18. My question is: is it an error connected with UE 4.20 integration, or maybe there is a chance that I am doing something wrong? I provide link for my test project. [https://drive.google.com/open?id=1tqeTfLfCP9lU7GfzFXWhbcaKf\_OdlG6r](https://drive.google.com/open?id=1tqeTfLfCP9lU7GfzFXWhbcaKf_OdlG6r) ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [October 31, 2018, 3:31am UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/2 "2018-10-31T03:31:35Z")
It appears to be caused by a bug in the UE4 integration introduced in 1.10.09, only for UE4.19 & UE4.20. We have identified the cause and should have the fix in the next release (coming in the next week or so). ---
**Author:** ![snajmiec](https://avatars.discourse-cdn.com/v4/letter/s/c4cdca/32.png) [@snajmiec](https://qa.fmod.com/u/snajmiec)\ **Post date:** [October 31, 2018, 10:06am UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/3 "2018-10-31T10:06:20Z")
> [@](#): > > It appears to be caused by a bug in the UE4 integration introduced in 1.10.09, only for UE4.19 & UE4.20. We have identified the cause and should have the fix in the next release (coming in the next week or so). Thanks a lot! ---
**Author:** ![yihoe1](https://avatars.discourse-cdn.com/v4/letter/y/76d3ee/32.png) [@yihoe1](https://qa.fmod.com/u/yihoe1)\ **Post date:** [November 20, 2018, 8:08am UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/4 "2018-11-20T08:08:18Z")
I’m waiting for this fix too. Unless I should downgrade to 1.10.08… T.T ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [November 21, 2018, 1:25am UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/5 "2018-11-21T01:25:15Z")
Apologies, the release has been delayed to ensure we can fix as many bugs as possible before it goes out into the wild. At this point it is likely going to be released at the end of this month. ---
**Author:** ![reveracorp](https://avatars.discourse-cdn.com/v4/letter/r/71c47a/32.png) [@reveracorp](https://qa.fmod.com/u/reveracorp)\ **Post date:** [May 11, 2019, 11:04pm UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/6 "2019-05-11T23:04:11Z")
Can someone confirm this is fixed in the current 2.0.0? I am having issues getting occlusion working in our project and wonder if this bug was resolved. ---
**Author:** ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)\ **Post date:** [May 16, 2019, 3:32am UTC](https://qa.fmod.com/t/ue-4-20-occlusion-integration-does-not-work/14162/7 "2019-05-16T03:32:01Z")
I believe this issue was fixed in 1.10.10: [https://fmod.com/resources/documentation-api?version=1.10&page=welcome-revision-history.html](https://fmod.com/resources/documentation-api?version=1.10&page=welcome-revision-history.html) If you are experiencing a problem in a newer version, I would recommend starting a new thread.