How to reproduce:
1. Open user attached project
2. Build & Run project to Android and observe the Terrain

Expected result: Terrain is rendered without any artifacts
Actual result: Terrain appears to be rendered with artifacts

Reproducible with - 2018.2.0a5, 2017.3.0a6, 2017.2.2p1, 2017.1.0a1 (can't test 2017.3/2018.1 latest versions due to --> https://issuetracker.unity3d.com/issues/android-player-containing-default-terrain-crashes-on-certain-devices-using-adreno-3xx-series-gpu)

DUT:
Reproducible with:
Xiaomi Mi 4i*, OS:5.0.2, CPU:arm64-v8a, GPU:Adreno (TM) 405, Build:Xiaomi/ferrari/ferrari:5.0.2/LRX22G/V8.1.5.0.LXIMIDI:user/release-keys

Not reproducible with:
Google Pixel 2*, OS:8.1.0, CPU:arm64-v8a, GPU:Adreno (TM) 540, Build:google/walleye/walleye:8.1.0/OPM1.171019.013/4474084:user/release-keys
Samsung SM G930F*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880, Build:samsung/heroltexx/herolte:7.0/NRD90M/G930FXXS1DQHF:user/release-keys
Samsung SM G950F*, OS:7.0, CPU:arm64-v8a, GPU:Mali-G71, Build:samsung/dreamltexx/dreamlte:7.0/NRD90M/G950FXXU1AQEB:user/release-keys
Xiaomi MI NOTE Pro*, OS:7.0, CPU:arm64-v8a, GPU:Adreno (TM) 430, Build:Xiaomi/leo/leo:7.0/NRD90M/7.10.12:user/release-keys
Motorola Moto G (4)*, OS:7.0, CPU:armeabi-v7a, GPU:Adreno (TM) 405, Build:motorola/athene/athene:7.0/NPJ25.93-14/16:user/release-keys
Google Nexus 5*, OS:6.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:google/hammerhead/hammerhead:6.0.1/M4B30Z/3437181:user/release-keys
Asus P01Z*, OS:5.0.2, CPU:x86, GPU:Mali-450 MP, Build:asus/WW_P01Z/P01Z:5.0.2/LRX22G/WW_ZenPad-12.26.4.57-20160419:user/release-keys
Lge LG D855 (G3)*, OS:5.0, CPU:armeabi-v7a, GPU:Adreno (TM) 330, Build:lge/g3_global_com/g3:5.0/LRX21R.A1445306351/1445306351:user/release-keys