This gives you quick previews of your models, textures, etc... but is also a pretty meaningless CPU sink. There is a nifty option in the content browser that it will generate realtime thumbnails of your assets. This one does exactly what you would expect, when Unreal Editor isn’t in focus (isn’t the active application) it massively lowers the CPU consumption and thus battery usage. Go to Unreal Settings (Unreal Editor->Preferences on Mac, File->Preferences on Windows), select Miscellaneous then under Performance verify that Use Less CPU when in Background is checked: This one should be enabled by default, but lets make sure. Make sure Use Less CPU when in Background is selected There is a similar setting when editing Blueprints as well. You can use the hotkey combo CTRL+R or CMD+R to turn this off.
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This setting prevents the viewport from constantly rendering, instead only updating when you change the view or update the scene. In the top left corner of the viewport, drop down the menu and unselect Real Time Rendering. The easiest first step is to turn off realtime updating for your viewport. Obviously this value fluctuates based on being focused or not and various other factors, but it gives us a starting point. This is Unreal Engine 4 running using the Twin Stick shooter example with the editor completely idle but focused. So, what follows is some tips to maximize your battery life as much as possible.įirst let’s take a benchmark of battery usage.
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Of course every single tip I am about to share comes at the cost of performance! Generally though, this isn’t really all that big of a deal… you don’t need UE4 running at full speed if you are working on Blueprints or testing some new C++ code for example. Fortunately there are some things you can do to maximize battery life. At the end of the day, Unreal Engine is designed to be run on a desktop machine, so power consumption is mostly an afterthought.
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The problem is, this is happening all of the time, even when you don’t need realtime rendering.
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The problem is that Unreal Engine editor is essentially an Unreal Engine game, running at nearly full clip. For developers like me, who are constantly on the go but not necessarily next to a plug, this is a bit of an issue. Of course any machine running intensive CPU and GPU activity is going to drain fast, but for comparison, running Unity on the same machine lasted about 4 hours. When I started my battery was showing 9 hours remaining. Obviously I wasn’t expecting exceptional performance but where I was truly staggered was battery life. Right when Unreal Engine 4 was released I promptly downloaded it on my Macbook Air.