title: Unity3D static splash image scalling options not working
body: <p>Unity3D Version: 2018.4.8c3 (2018.4.16f1 same problem)</p>
  
  <p>I am trying to make a static, full screen splash image for Unity3D Android app. however, I found that the splash image could not scal/resize properly on different resolution android phones.
  Unity Doc says three different kinds of scalling <a href="https://docs.unity3d.com/Manual/AndroidMobileCustomizeSplashScreen.html?_ga=2.222032984.1151247312.1581055880-250153184.1570517738" rel="nofollow noreferrer">unity doc</a>:</p>
  
  <p>Center (only scale down) draws your image at its natural size unless it is too large, in which case it is scaled down to fit.</p>
  
  <p>Scale to fit (letter-boxed) draws your image so that the longer dimension fits the screen size exactly. <strong>Empty space around the sides in the shorter dimension is filled in black.</strong></p>
  
  <p>Scale to fill (cropped) scales your image so that the shorter dimension fits the screen size exactly. The image is cropped in the longer dimension.</p>
  
  <p>In my Player settings:
  <a href="https://i.stack.imgur.com/MncYC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MncYC.png" alt="enter image description here"></a></p>
  
  <p>the splash sprite is 720*1440 resolution.
  But when I runs it on 2080*2340 phones, ends up like this</p>
  
  <p><a href="https://i.stack.imgur.com/VRdym.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VRdym.jpg" alt="enter image description here"></a></p>
  
  <p>I know the splash image is white and not proper scalling results blank gaps that looks augly.
  Changing scalling setting does not shown change after build. I find there must be a scalling method taking the screen size into account. Different notch on android phones results in difference scalling looking.</p>
  
  <p>what's the proper way making a full screen splash for all android devices? what's a optimal size for splash image?
  Thanks</p>