A road of cigarettes with particles

[alireza-bidar]

Hi Guys
I am facing a problem on recent project that I am working on.Maybe you guys can help me.Basically I am making a road by smoked cigarettes.Its around 120000 cigarettes.Now my problem is that particles have collision with each other,I enabled separation parameter for particles but it doesn't work well,still there is collisions ,Also tried multiscattering,vray scatter,fR-Scatter plug ins.They have self collisions option,but because they make a bounding box around of each cigarettes and most of cigarettes having bend,so it makes empty area between cigarettes.I want make the road filled by cigarettes.I don't mind if they are on top of each other just not floating on the air.What solution do you guys suggest me ?

[alexander-bereznyak]

hi man

• the case is not completely clear. if I understand correctly, you are not talking about particles of smoke, but instead are trying to fill the flat area with cigarettes at random angles.

• if they are not animated, i would suggest making several meshes (6x6 feet for example) containing the cigarettes, and then pave the road with these chunks.

• depending on your camera you might not need to worry about collisions at 99% of cases, or possibly even not working with meshes but use camera-oriented planes scattered at random.

• you may also want to texture the "floor" with scattered cigarettes and see how many meshes do you need on top of that. at least, that would help making "holes" less noticeable. some samples can be easily found

• not sure which software you are using, I will assume 3d max. straight-on solution would be just make multiple clones of cogarette mesh and use reactor (havok 3 of course) to let them cover the area. "floor" collider this way would be a box without top, so your edges would fit well.

• in case you make several chunks of geometry, you may end up not even using actual geo to "pave" the road, but render those as diffuse/displacement maps, to be applied to flat surfaces later

---

www.alsber.com