Maya 2012 Tutorial
How to Add Volumetric Smoke in Maya
One way to create smoke is to use a Volume Primitive. As you add the primitive, it is automatically connected to a Fog node. By adding a texture to the Transparency node, you can quickly create a smoke effect.
Add a Cube volume object to the workspace by choosing Create > Volume Primitives > Cube.
In the Attribute Editor, fog tab, click the Color rectangle to change the fog color.
Click the checkerbox next to the Transparency slider to open the Create Render Node panel.
In the Create Render Node panel, 3D Textures section, click Cloud.
Click the IPR icon, then marquee drag in the preview window to view your adjustments in real time.
In the Attribute Editor, cloud tab, adjust the Contrast, Amplitude and other settings to fine tune your smoke.
Add an object to your scene and scale the smoke cube. Click the Render Current Frame icon to see the effect.