Particle opacity

[anon12816761]

I’m trying to get a good fog effect using a particle system. I have everything looking the way I want it except for the opacity of the particles.

I have looked through the particle animator and renderer and haven’t found anything that allows me to tweak the opacity level. I also looked at the default- particle material and the alpha blended premultiply shader, couldn’t find a variable to tweak it there either. I was reading a previous post that mentioned an opacity slider in the animator, but I don’t see anything like that in my engine (Unity 3.4). Could somebody please point me in the right direction to solve this problem? It would be GREATLY appreciated. Thanks!!

[anisabboud]

When you open Color over Lifetime in the Inspector of the Particle System, you can:

• Click the little arrows below the gradient bar to set the color.
• Click the little arrows above the gradient bar to set the opacity.

[anon19958801]

There are 2 ways that I know of to control the alpha of a particle;

Material Shader

For the particle material use a Shader that allows you to define a tint color and set the alpha of the tint.

Particle Animator

In the Particle Animator component notice the Color Animation[0], Color Animation[1], etc. This allows you basically another tint color that it animates based on the lifetime of the particle. They start at 0 and smoothly blend between each step until 4. You can set the alpha of the particles here as well.

[DVFrance]

I didn’t really understood well how the particles animation works (component/effects/legacy particcles).
But I just found an other way to have opacity, in the particles view, in color over life, you can choose a color over life but also an opacity (like in photoshop when you use gradient, you select the upper arrow and can choose the opacity.
It’s better with a picture :

Hope it helps !