Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

ARKit functionality 4.18 P1


Couple days in testing 4.18 p1 and ARKit. So far following simple MaterialFunction both with other devs we've managed to get RGB camera feed on our devices. See here

Unknow for us is the way to properly setup simple placing objects project. I understand there's no documentation yet, however any pointers would be much appreciated.

Below you'll see the setup we're using: Cube spawn setup

This setup was working properly back in beta on 4.17. Right now it does spawn the actors, however it seems like it doesn't account for AR functionality.

AR spawning transform off

Additionally portrait orientation at least on iPhone 6s is broken, whenever switched aspect ratio gets messed up.

Broken portrait mode

Landscape mode working fine

However switching landscape upside down will make screen not rotate accordingly.

Product Version: UE 4.18 Preview
ah1.png (61.3 kB)
img-0948.png (969.2 kB)
img-0949.png (1.3 MB)
img-0950.png (1.2 MB)
more ▼

asked Sep 25 '17 at 10:53 AM in Bug Reports

avatar image

106 5 6 11

avatar image Tim C ♦♦ STAFF Oct 02 '17 at 07:52 PM

Hi Shin_ji,

We are aware of a few issues currently that are related to using ARKit with an iPhone. One of those actually prevents me from being able to do any testing with the ARKit at all, so I apologize about that. Have you seen any improvement with Preview 2?


avatar image Shin_ji Oct 03 '17 at 08:07 AM

Hey Tim,

Thanks for reaching out. Sadly P2 is missing ARKit plugin components, be it camera, texture, methods and functions needed to run simple object placing app. Based on what's going on on Epic's github I can assume that preview 3 will bring functionality back, though for full implementation with plane anchor visualization we'd need to wait for final release.

Is there anything you could add in terms of using ARKit and planned features for 4.18 ?

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

3 answers: sort voted first

Due to a large number of changes made to ARKit integration compared to 4.17 and 4.18 being a preview build I'm marking this as answered. It seems that based on commits made by Epic in 4.18 source there are alot of tweaks and improvements to ARKit functionality which will made it to 4.18 final release.

more ▼

answered Oct 09 '17 at 07:17 AM

avatar image

106 5 6 11

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

My one is working perfectly on 'right landscape.' alt text

And about the spawning, in my case sometimes it not function but I tried to restart the editor, and it 's fixed the problem! or If you turn 'Mobile HDR' on, may be trying to turn it off and see what happen. Almost every time I turn 'Mobile HDR' on I couldn't see spawned cubes.

more ▼

answered Sep 26 '17 at 08:08 PM

avatar image

1 1 2

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

Hi Bestspangya

I get pretty much same result in - 4.18 preview 3. Mobile HDR on = no spawned/existing objects.

  • arkit passthrough camera texture is still red.

You say that sometimes you have had visible spawn - even with hdr on - do you know when that happened?


more ▼

answered Oct 09 '17 at 07:13 AM

avatar image

1 1 2 3

avatar image Shin_ji Oct 09 '17 at 07:15 AM

Sadly no. I've dropped preview builds and rolled back to 4.17. I was hitting to many walls in 4.18, waiting for final release and some proper documentation.

avatar image kafl Oct 09 '17 at 07:20 AM

Hi Shin_ji

Ok - i know ARkit is relavtively new - but where you able to get usefull results in 4.17? with spawning, camera texture not beeing too dark, mobile HDR, etc?

Best regards Karsten

avatar image Shin_ji Oct 09 '17 at 07:24 AM

My only issue with 4.17 is quite poor tracking. Which on the other hand will do as far as testing is concerned. I'm eager to actually release something for iOS ARKit therefore can't wait for 4.18.

I've managed to get simple actor/objects spawn as well as whole levels. The camera texture didn't seem dark for me. And haven't tested mobile hdr that much tbh.

Based on the stream from Epic last week we can expect alot of improvements to ARKit.

avatar image kafl Oct 09 '17 at 07:26 AM

thx for info :-)

(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question