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"

Strange distortions in VR


I work on a project on a computer for some weeks and everything was fine until I had to copy my project on another computer. In VR mode some strange distortions appears on the helmet. The distortions are not the same between the right eye and left eye and seem to appear where contrast is important. The distortion is noticeable in vertical and horizontal movements.

You'll find a screenshot attached. The red ans blue products are heavily affected by the problem.

Does anybody have any idea ?

Many thanks, Françoisalt text

Product Version: UE 4.11
more ▼

asked Mar 28 '17 at 06:41 PM in VR

avatar image

1 2 1

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

1 answer: sort voted first

If you are talking about the various color channels seeming to separate near the edges of the screen, this is intended as it is necessary to get the image to display correctly in the headset. Different wavelengths of light bend different amounts when they pass through a lens. In order to counteract this, the video output to the headset must offset certain colors slightly to get them to the correct locations on your retina after passing through the headset's lenses.

This may not be the effect you are talking about, but that's all I can see in the image you provided.

more ▼

answered Mar 28 '17 at 10:17 PM

avatar image

427 20 96 123

avatar image Piranese Mar 28 '17 at 10:38 PM

Hi Janimationd,

Thank you for your answer but i wasn't talking about the chromatic distortion. If you have a closer look to the red boxes and compare the right image and the left image you will understand were my problem is. It don't look obvious at the first sight on a still picture but i can tell it's a true mess when it comes into the VR helmet ! ;P

avatar image Piranese Apr 14 '17 at 08:05 AM

I managed to identify the source of the problem : i was using the deprecated function "HMD SP" to increase the sharpness of the picture on the HMD so i switch to the "HMD PD" command but sadly it didn't fix the issue.

These distortions are less visible on more powerful configs but still present. I've upgraded from 4.11 to 4.15 but the results are the same.

Does anyone have any idea on the way to bypass these functions while maintaining a high level of precision on the HMD ?

(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