Have simple material with SphereMask, in windows it working perfect, but on mobile have wrong results.
Material
In Editor preview
On Moblie device (iOS 8.3, iPhone 5s)
Hi BorodMorod -
Thank you for your report. I was able to reproduce the issue internally and have reported it as UE-16307. We will keep you informed as we investigate a solution.
Thank You Again -
Eric Ketchum
The bug came back as ‘Won’t Fix’ as this was related to a mediump precision issue. The best fix we determined for this would be to ensure this material uses full precision. We will be adding a feature within an upcoming release to allow users to account for the full precision within their materials. This should resolve the issue.