Mobile Skylight rendering errors on Android devices.

sharbong · July 19, 2015, 2:12pm

Hello.

I’m developing a mobile game with Unreal 4.8.
I have a problem about using SkyLight without a lightmap.
It’s working well on mobile preview and android devices with Snapdragon chip.

However it’s not working on devices with Exynos chip including Galaxy S6, Galaxy Alpha.
On these devices, the color is just displayed as black.

Settings are as follows.

Directional light: Movable

Sky Light: Stationary or Movable

Now I’m using SkyLight with a lightmap, so the performence is also decreaed.
How can I use SkyLight without a lightmap?

I would appreciate for your help.

Mobile Preview

Exynos chip Devices

anonymous_user_2ed5b4c7 · July 20, 2015, 7:20am

Hi!

Most of mobile device are not support HDR. And you can not use more than one dynamic light in scene. Try to use this solution:

spiez · October 21, 2015, 9:31am

I’m having the same problem with a Samsung Tab S2 (which uses the same CPU+GPU that the Samsung Galaxy S6). The fact is that Epic compatibility tests show that the S6 should be compatible with HDR+Sun, here: A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums .

So, how come I’m getting black shadows while this does not happen with Snapdragon chips?

anonymous_user_6e7b421a · October 21, 2015, 8:49pm

Hello spiez,

The Samsung Tab S2 and the Galaxy S6 are quite different inside.

The Galaxy S6 uses the Mali GPU.

As for the question of Skylight without a lightmap, setting it to movable and unchecking cast shadows will not only help save performance, but it will also not use a lightmap/shadowmap texture. You can also try unchecking the ‘Lower Hemisphere is Black option’ to see if that helps.

Thanks,