Leaking flames

Hi
I’m trying to model a rocket exhaust plume, I have a particle emitter that gives a realistic flame but when placed in the rocket nozzle the plume appears to leak out all around the nozzle when rendered. I’m sure I must just be missing a setting as it all looks right in the 3D view, can anyone help?
A sample render is attached, as is a screenshot of the 3D view.
Best
Wolfenden

Attachments



Set the material of your emitter to Halo, and adjust the settings … size first of all, of course.

http://wiki.blender.org/index.php/Doc:Manual/Materials/Halos

Thank you very much for your help…
I knew it’d be something simple I’d missed!
Thanks
Wolfenden