Google Daydream

[aussieburger]

@Sam Deiter;585036

After doing a little R&D about this here is what I found out. The ATC format gives you great texture compression and more importantly, supports alpha channel compression. ECT1 does not support alpha channels and this and that is why this format will run on any Android device. ETC2 supporst alpha channel compression but the compression of the textures in general is not as good as ATC.

One of the reasons as to why you are seeing textures turn up black is that your phone might not support the ATC texture format. This would explain why you see black textures when packaging your game with ATC but not with ETC2. The reason that ATC was put into the document is because ATC is the perfered format to use with the newer model phones that are coming to market soon. So using ECT2 for your Google Daydream project will work and it should not give you any issuses in terms of perforamnce or people being able to view your project. If you want to read more about Android texture compression methods, check out the following page.

Android Developers Blog: Efficient Game Textures with Hardware Compression

alpha

@;585041

Looks like ATC is only for Adreno GPUs. So it won’t work on Exynos.

Why not to use ASTC? (besides bogus compression tools in UE4 which make project cooking a nightmare)

Thanks for the info Sam and it looks like nailed the problem as my phone is a S7 Exynos - since samsung like to use Exynos chips for many regions of their phones there is a high probability that their daydream device will not support ATC

(PS: the textures aren’t black - they are the default grey fallback textures you sometimes see in the engine when adding a new mesh without a texture.)