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Ribbon particle not visible when coming from behind

In our setup we are moving along a road. Then we simulate traffic coming from behind overtaking you and traffic that is on the other lane traveling towards you. I visualize this traffic with a ribbon particle. I have an actor with a particle component attached and i move the whole actor past me. The problem is that the ribbon particle is not visible when it comes from behind. here you can see the debug sphere that indicates the actor's location. The ribbon is not visible. alt text The funny thing is that if i look behind me with the camera and then to the front again the particle suddenly appears. As if it needed to be out of my view and then back in it again to become visible. This is what it looks like when i have looked behind me and then to the front again. alt text

The traffic that is on the other side of the road, which spawns ahead of me and comes towards me, acts fine.

My setup is very simple. Just a ribbon particle with a lifetime of 2 seconds. alt text

Product Version: UE 4.15
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asked Apr 25 '17 at 08:51 AM in Using UE4

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EstherZuidgeest
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avatar image EstherZuidgeest Apr 25 '17 at 09:34 AM

I also have these warnings in the output log: LogParticles:Warning: RIBBON : FillReplayData failed. LogParticles:Warning: IndexCount (360262) exceeds allowed value (65535). LogParticles:Warning: ActiveParticleCount = 51. LogParticles:Warning: TriangleCount = 360260. LogParticles:Warning: TrailCount = 1. LogParticles:Warning: /Game/Effect/vehicles/Taillights_P.Taillights_P

I haven't found an answer on the forums about that warning.

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Don't know about the warnings, but...

I think you may solve your issue checking the setting that makes your material two sided. Hope it helped! :D

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answered Aug 04 '17 at 09:05 AM

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Mighty Marcos
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