[yt-users] opaqueness of iso-surface

[Renyue Cen]

Hi,

For  iso-density surface I have a primitive question: how do I make certain contour level totally opaque?
I can do " tf.add_gaussian(-25.5, 0.05, [1.0, 0, 0, 1.0])"
but specifying alpha=1.0 in this example does not seem to make that level (red) totally opaque.

Thanks,
Renyue