Black artifact on iOS device

Development Platform & Builds Mobile
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1

Hey.when i package my game for ios i see this black artifacts (just on device).these are things happend and i ve done so far :

1 - first time it appeared when i chekced “never stream” on all of my textures,then i uchechekd them and it disapeared.

2 - second and last time , i see no special reason to cause that , this time i did this :

  • i removed my post process volume and it did not affect

  • decrease my lights intensity and the artifacts disapeared

  • simplified the material of level floor (that is a staticmesh) and this also worked.

what can be the exact reason ??

*** i also ve read this “https://answers.unrealengine.com/questions/260956/strange-artefact-on-ios-device.html”

*** i read my game log on device and this line took my attention :

“LogRHI:Warning: Device reports support for 128 vertex uniform vectors, UE4 requires 256. Rendering artifacts may occur, especially with skeletal meshes. Some drivers, e.g. iOS, report a smaller number than is actually supported.
[2015.02.22-11.49.40:260]”

screen shot + log are attached.
hope this help me staff and users.

59383-img_0182.jpg
59383-img_0182.jpg2048×1536 228 KB

[link text][2]

2

Hey ,

In order to further assist you, could you please provide the full from your project? Also, which iPhone are you using, please provide the exact model and which version of the operating system are you on?

Looking forward to hearing back from you, thanks!

3

hey ,

i am using an “” with ios version 8.4 . are attatched.[link text][1]

59793-.rar (2.56 MB)

4

,

Thank you for providing me this information. I have pushed projects to an as well as the . I followed your steps and was unable to get this to happen. Do you have exact reproduction steps I could follow? Have you tried a newer version of the engine? Have you attempted to push to another iOS device?

Thanks!

5

tanx

i will try your offers,currently i can not move to a newer version cause some functions may not work and i dont have time to fix it.but i will test it on a different device.

for now,i think this is something by performence,maybe your levels are not as heavy as mine.anyway i test and inform you.
tanx.

6

You’re very welcome. Please let us know if you have any further complications!