Problem with a laser

This is my material

280687-materiallaser.png

When i launch the game in viewport:

If i’m close to the laser beam

No problem

But if i’m further, the laser beam is weird

How I can fix it ?

Can you show the material?

How about the mesh, anything special? Have you tried applying it to other objects?

Anything Special
I’ve tried on a basic cube and with the cube no problem

So how does the mesh look like?

And when i press F8 and i watch the laser beam no problem

the mesh is a cylinder