Hi, I'm making a large fire pit, could someone help me create a particle system. I dislike the look of the flames in Smokey. (http://forum.unity3d.com/threads/21243-flames-like-fire-in-fireplace) I'd prefer to have flames that look like the ones in Standard Assets>Particles>Fire>Flames. How could I make this on a much bigger scale? How can I grow the flames? I don't want the flames to be taller, just wider. How can I achieve this realistically?
Take a look at the Detonator Package and see what they have done with scaling, sound, image effects ...
You'll need good to great fire animations with alpha channels. ArtBeats was the king of this, here's an explosion example of what they do. But you'll find great fires on their site too. http://www.artbeats.com/clips/PE212A/NTSC
Having found a good fire flame animation, you then need to place the frames of that you like out in a grid format within an image file that supports alpha channel storage. And make sure the grid format you choose is compatible with Unity's particle system renderer. To be simple, choose a 4 x 4 or 8 x 8 square grid, where each grid is 128 x 128 pixels so you're working with a 512x512 or 1024 x 1024 texture. If your fire is going to be HUGE, then you might need 512x512 grid units for a 2048x2048 or 4096 x 4096 texture, but be warned this is gonna restrict the speed of your particles/framerate on mild machines.
Once you've done all this, you'll need to tell Unity's particle materials renderer that you've got an image with a grid... 4x4 or 8x8, and it'll figure out how to go through them. And you'll need to make your particles rotate randomly, locally in their Y axis relative to the camera so they don't look bland/boring/repetitive.
Thanks guys, but I don't really understand particles so I decided to replace my fire with lava.