I played around with the new unborn feature, it works well but i cant get rid of the halo texture of the Particles.
If i just add a Texture to the Emitter object it makes no big difference.
The Object should look solid in the first frames.
I tried to use a Cube as Particle (Dupliverts on) but then the Emitter Object look like its build up from Lego-Blocls in the beginning.
It is posible couse its shown here…
http://blender.org/cms/New_Particle_options_a.721.0.html
Any ideas??