Gas molecule movement simulation - simple

Questions & Answers
1

So I’m trying to do something really simple even the questions sounds confusing. I basically want to simulate a gas particle - which at the beginning has a random rotation and goes in a random direction with constant movement and when it hits a wall it hits a wall like a normal ball basically. It also needs to be able to collide with other particles.

I’ve tried a bunch of things which I don’t think are worth posting because they didn’t work.

Help would be VERY VERY much appreciated!

2

Try Particle System and Unity’s built in particle system already supports collision. You need to look into the Collision Module that is already on particle systems.
See this