# Ribbon particle not visible when coming from behind **URL:** \ **Category:** Rendering\ **Tags:** culling, particle-system, ribbon, ribbon-trail, unreal-engine, Rendering, question\ **Created:** [April 25, 2017, 8:51am UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851 "2017-04-25T08:51:51Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![EstherZuidgeest](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EstherZuidgeest](https://forums.unrealengine.com/u/EstherZuidgeest)\ **Post date:** [April 25, 2017, 8:51am UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/1 "2017-04-25T08:51:51Z")
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. ![135444-ribbontaillight.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/d/b/1db17b1cae521ff06b66d345b256308132382d71.jpeg) 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. ![135445-ribbontaillight2.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/3/2/032dfe5c1f2dd6f0191f748c5740600c2ef55fbf.jpeg) 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. ![135446-ribbontaillight3.jpg](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/4/f/74f5c2756c9126c6ac7f4ae26877362f0e948241.jpeg) ---
**Author:** ![EstherZuidgeest](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@EstherZuidgeest](https://forums.unrealengine.com/u/EstherZuidgeest)\ **Post date:** [April 25, 2017, 9:34am UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/2 "2017-04-25T09:34:38Z")
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. ---
**Author:** ![Mighty\_Marcos](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Mighty\_Marcos](https://forums.unrealengine.com/u/Mighty_Marcos)\ **Post date:** [August 4, 2017, 9:05am UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/3 "2017-08-04T09:05:23Z")
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! 😃 ---
**Author:** ![theGreatDW](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/thegreatdw/32/961286_2.png) [@theGreatDW](https://forums.unrealengine.com/u/theGreatDW)\ **Post date:** [November 26, 2022, 6:40pm UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/4 "2022-11-26T18:40:30Z")
same issue, have you fixed your particle? 🥲 ---
**Author:** ![3dRaven](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/3draven/32/906552_2.png) [@3dRaven](https://forums.unrealengine.com/u/3dRaven)\ **Post date:** [November 26, 2022, 6:43pm UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/5 "2022-11-26T18:43:48Z")
Have you tried setting the particle material to 2 sided? ---
**Author:** ![Ivan3z](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ivan3z](https://forums.unrealengine.com/u/Ivan3z)\ **Post date:** [October 29, 2023, 8:41pm UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/6 "2023-10-29T20:41:05Z")
Hi @3dRaven I just to try it… it does not work. ![1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/3/d/93d201425b1cd11dd408b83f8ad90cb8af980120.png) Any other idea? Thank you!! ---
**Author:** ![3dRaven](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/3draven/32/906552_2.png) [@3dRaven](https://forums.unrealengine.com/u/3dRaven)\ **Post date:** [October 29, 2023, 9:16pm UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/7 "2023-10-29T21:16:24Z")
Are you assigning it to a niagara system with a ribbon renderer? Is the particle’s Facing mode set to “Screen”? Does your material have use with ribbon set to true? ![ribbon](https://d3kjluh73b9h9o.cloudfront.net/original/4X/6/1/a/61adba907ff4fa47615db2fc2f545153ea424a19.png) ---
**Author:** ![Ivan3z](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ivan3z](https://forums.unrealengine.com/u/Ivan3z)\ **Post date:** [October 29, 2023, 9:42pm UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/8 "2023-10-29T21:42:36Z")
Yes, i have that options checked. The problem is when the ribbon is coming from behind of other player. The other player can not see it. When the ribbon is in front the other player, then he can see it. Could it be some optimization option? Thank you!! * * * I think the problem could be the same she is saying. > [@EstherZuidgeest](#): > > The funny thing is that if i look behind me with the camera and then to the front again the particle suddenly appears. ---
**Author:** ![Ivan3z](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Ivan3z](https://forums.unrealengine.com/u/Ivan3z)\ **Post date:** [October 30, 2023, 1:20am UTC](https://forums.unrealengine.com/t/ribbon-particle-not-visible-when-coming-from-behind/391851/9 "2023-10-30T01:20:43Z")
Hi @3dRaven The problem was resolved here: > [@Is this a optimization settings problem? (Ribbon is not visible when the other player is looking in another direction)](https://forums.unrealengine.com/t/is-this-a-optimization-settings-problem-ribbon-is-not-visible-when-the-other-player-is-looking-in-another-direction/1351772): > > The problem is when the ribbon is coming from behind of other player. The other player can not see it. When the ribbon is in front the other player, then he can see it. I think it could be some optimization setting problem. (some culling settings or something like that). I was looking in the character settings, in the camera setting, in the project settings, in the particle system settings, but at the moment i found nothing to fix it. In this video you can see what is happening: And… Thank you so much for try to help me!! ❤