# Lighting Issues When Transferring from PC to Mac **URL:** \ **Category:** Rendering\ **Tags:** unreal-engine\ **Created:** [May 1, 2015, 3:05am UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045 "2015-05-01T03:05:53Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![bnisbet](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@bnisbet](https://forums.unrealengine.com/u/bnisbet)\ **Post date:** [May 1, 2015, 3:05am UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/1 "2015-05-01T03:05:53Z")
Hello there, I’m currently working on a project on both a Mac and PC, transferring the project manually when necessary. The transfer goes smoothly, with all assets and materials generated properly, but I’m having an issue with lighting. I created the lighting on the PC, and it looks great. Then I transfer the whole project over to the Mac, and the lighting in many of the locations is significantly darker than it appears on the Windows version. I checked the light values, and they’re consistent across the platforms. Is this a known issue? I could certainly attempt to tweak the lights manually on the Mac to get the desired brightness, but this would cause issues when I transfer back the the Windows. Any advice for getting consistent lighting? See the images below for comparison. ![40911-pc.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/4/e/34e7f6ad468649fd26903fca5d246670b52bdcbe.jpeg) This is an image from the PC ![40912-screen+shot+2015-04-30+at+3.55.49+pm.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/4/a/34aed52caccbb3e5019bb83a66b5c8fc666d4845.jpeg) This is the same room, same materials, and same lighting on the Mac. ---
**Author:** ![BenjvC](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BenjvC](https://forums.unrealengine.com/u/BenjvC)\ **Post date:** [September 30, 2015, 5:05pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/2 "2015-09-30T17:05:32Z")
I’m seeing the same behavior here, identical difference in intensity between Mac and PC, regardless of which end is first to generate the scene. I see I’m the first to answer to your issue from back in April. Were you ever able to resolve the problem? If so, thanks for sharing ---
**Author:** ![dorianv](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@dorianv](https://forums.unrealengine.com/u/dorianv)\ **Post date:** [October 15, 2015, 9:53pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/3 "2015-10-15T21:53:38Z")
Same issues here. ---
**Author:** ![Rankopfpro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Rankopfpro](https://forums.unrealengine.com/u/Rankopfpro)\ **Post date:** [November 8, 2015, 6:20am UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/4 "2015-11-08T06:20:41Z")
Also experiencing this issue. Doing a game jam and team mates on PC have no issues with Lighting. I on the other hand have this issue on Mac. We encounter this on our project last year and had no solution. Two different game, different versions on the engine and even different Macs. Currently on OS X 10.11.1 and UE 4.9.2 ---
**Author:** ![BenjvC](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BenjvC](https://forums.unrealengine.com/u/BenjvC)\ **Post date:** [November 8, 2015, 5:00pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/5 "2015-11-08T17:00:55Z")
My issues have cleared in the meanwhile. I’m thinking this related to various platforms working off a cloud and opening into different engines. Once we all got on the same page with the same engine, synced to the same project file, the problem went away. Can’t be certain it’s that simple, but possibly is. ---
**Author:** ![bnisbet](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@bnisbet](https://forums.unrealengine.com/u/bnisbet)\ **Post date:** [November 8, 2015, 6:48pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/6 "2015-11-08T18:48:10Z")
Sorry for the late response. To remedy this, I had to adjust the lighting intensities and values manually on the Mac version to match the appearance of the PC version. Unfortunately, I wasn’t able to find anything that was more efficient than this. ---
**Author:** ![Rankopfpro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Rankopfpro](https://forums.unrealengine.com/u/Rankopfpro)\ **Post date:** [November 8, 2015, 8:35pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/7 "2015-11-08T20:35:57Z")
We are all on UE4.9.2 and using Perforce to sync, ---
**Author:** ![Rankopfpro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Rankopfpro](https://forums.unrealengine.com/u/Rankopfpro)\ **Post date:** [November 8, 2015, 8:36pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/8 "2015-11-08T20:36:33Z")
Thanks, but not sure if I can do something like that now. ---
**Author:** ![Rankopfpro](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Rankopfpro](https://forums.unrealengine.com/u/Rankopfpro)\ **Post date:** [November 10, 2015, 7:20pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/9 "2015-11-10T19:20:05Z")
Ok After digging around to answer this question for myself I found out the issue is caused by OpenGL and therefore Mac not supporting Eye Adaption. So on PC, if the lighting is too dark they camera adapts to bring up the exposure, on the Mac, it just stays dark. So the solution is to adjust the lighting to be more intense, like has been posted here. If you want to disable this feature on the PC version so you can match the lighting between both builds, you need to disable it for each camera, including the player camera included in your blueprints. Once you select the camera, in the details window go to Camera Settings \> Post Processing \> Auto Exposure. Then disable all but the Min and Max Brightness and set these to 1. Now you lighting will stay the same. Of coarse if you like or need that feature you are out of luck as far as I can find. Hopefully when Unreal implements the Metal API support this feature will work, here’s hoping. ---
**Author:** ![anonymous\_user\_491e169c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_491e169c](https://forums.unrealengine.com/u/anonymous_user_491e169c)\ **Post date:** [December 12, 2016, 7:54pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/10 "2016-12-12T19:54:17Z")
@Rankopfpro, thanks for the tips! That seems to have worked 🙂 ---
**Author:** ![bakimblow](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@bakimblow](https://forums.unrealengine.com/u/bakimblow)\ **Post date:** [December 17, 2023, 3:55pm UTC](https://forums.unrealengine.com/t/lighting-issues-when-transferring-from-pc-to-mac/317045/11 "2023-12-17T15:55:39Z")
It has been nine years and still your knowledge shines through the mist of time. You have my thanks.