I want my particles to reflect alpha when rendering particles in Karma.

I set the alpha in wrangle to match the lifetime of the particles created in obj.
Then I loaded it into Stage with SOPimport. However, Karma did not seem to reflect that alpha setting.
In Mantra, I was able to render particles that became progressively more transparent over their lifespan.
How can I set the alpha for particles when rendering with Karma?
The @Alpha created in the obj hierarchy does not seem to be reproduced in Karma.
Please let me know if there is any other easy way to do this.

I am using the translate function, so my writing is a bit rusty, but any advice would be greatly appreciated.

you have to use displayOpacity instead Alpha in the opacity material

Thank you for answering
I'm using Material X. However, I don't understand the setting for particles to become transparent as their lifespans pass. I would appreciate it if you could let me know.