To reproduce:

1. Download and open attached "case_997887-AndroidStereoTest.zip" project.
2. Build and run on Galaxy Note 8 device.
3. Notice Sharp edges in the bottom inner side of the VR eyes.
- Issue won't reproduce unless Headset in VR settings is set to "Default Cardboard"

Expected result: The area at the bottom inner side of VR eyes is smooth, without sharp edges.
Actual result: The area at the bottom inner side of VR eyes has sharp distorted edges.

Reproduced with: 2018.2.0a1, 2018.1.0b8, 2017.3.1p1, 2017.2.1p4, 2017.1.3p1

Devices under test:

Reproduced with:
Samsung SM N950F*, OS:7.1.1, CPU:arm64-v8a, GPU:Mali-G71,
Build:samsung/greatltexx/greatlte:7.1.1/NMF26X/N950FXXU2BQKG:user/release-keys

Not reproduced with:
Samsung SM G930F*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T880,
Build:samsung/heroltexx/herolte:7.0/NRD90M/G930FXXU1DQJ3:user/release-keys

Google Nexus 6P*, OS:7.1.2, CPU:arm64-v8a, GPU:Adreno (TM) 430,
Build:google/angler/angler:7.1.2/N2G48C/4104010:user/release-keys

Google Pixel 2 XL*, OS:8.1.0, CPU:arm64-v8a, GPU:Adreno (TM) 540,
Build:google/taimen/taimen:8.1.0/OPM1.171019.018/4518263:user/release-keys