I've followed an old Blender Guru tutorial on creating muzzle flash, using it in Cycles instead of Blender Render as he did. The mesh is shaped like a rounded double-ended cone, then has Subsurf and Displace modifiers applied to it to create the flared effect. The material uses a 50/50 mix of Emission and Volume Scatter shaders plugged into the Volume output.
When rendering the scene, bright lines appear on the edges of the displaced mesh, highlighting them. I've been learning 3D modelling/rendering for the past several months so am still relatively new and unsure as to what is causing this, it's as if the light rays are trapped in the sharp edges.
This issue doesn't pertain to this particular model or scene either, as I tried modelling it from scratch again in a different scene and had the same issue. Could anyone please advise me as to how I could stop the bright edges appearing? Ideally the orange colour should just fade out.