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Objects are invisible at certain orientations, only when viewed through an orthographic camera

Hi, I'm trying to make an application that allows the user to rotate a model with the arrow keys. The application worked fine until I switched my in game camera to being an orthographic camera, now at some orientations the model disappears from view completely. I'm doing the rotations using blueprints, and I've watched the values in the blueprint and nothing funny happens to them. Here's what it looks like when its bugged, with my object not showing up:

Bugged, model doesn't show

Here's what its supposed to look like when I set the object to a different rotation with my key inputs:

Ok, model shows up

It seems like at only a few orientations it bugs out, if I randomly spin it around it only bugs out and disappears maybe 5% of the time.

Product Version: UE 4.8
bugreport1.png (1.3 MB)
bugreport2.png (1.3 MB)
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asked Jun 22 '15 at 05:25 PM in Bug Reports

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avatar image Ben Halliday STAFF Jun 24 '15 at 08:45 PM

Hi janimationd,

I made a project with this same setup, but I was not able to reproduce this with the orthographic camera. The only thing I can think is that maybe your camera is in a position relative to the rotating actor such that the actor is no longer in view, though that seems unlikely if it only occurs sometimes.

Can you upload the project somewhere like Google Drive or Dropbox so I can take a look? You can send me a download link privately if you need to via PM on the forums:



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Hi Ben, I can no longer replicate the issue, it's likely because I switched away form the mobile version of the UE4 Mannequin in favor of the normal model. My camera wasn't near the model, and it only happened at really odd angles. I don't think posting my project will help since the issue no longer exists. We can mark this resolved since its no longer an issue for me, but I'm guessing the mobile version of the UE4 mannequin was causing issues.

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answered Jun 26 '15 at 05:45 PM

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avatar image Ben Halliday STAFF Jun 27 '15 at 06:53 PM

Glad to hear it's not a problem anymore! I'm still not able to reproduce this, even when using the mobile mannequin, so if the issue comes up again please reopen this post and we'll keep looking into it. Thanks!

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