Tupac Resurrected at Coachella

A rep for Afeni tells TMZ, she was absolutely positively THRILLED with Tupac's virtual performance -- when he appeared alongside Dr. Dre and Snoop Dogg during the headlining show at Coachella last night ... walking back and forth across the stage like he was actually present.

Afeni didn't attend the performance -- but we're told she watched it unfold live on the Internet ... but while it was thrilling, the entire experience was bittersweet.

The rep says Dr. Dre asked Afeni for approval to incorporate Pac into his performance -- and she said yes. As a thank you, we're told Dre made a donation to the rapper's charity ... The Tupac Amaru Shakur Foundation.