Tupac's Mom Coachella HologramWas Frickin' AMAZING

Tupac's famously protective mother Afeni Shakur agrees with the rest of the planet -- the rapper's resurrection at Coachella this weekend ... in the form of an incredibly lifelike hologram ... was mind-blowingly awesome.

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.

TMZ also spoke with Dre's crewmate Daz Dillinger -- who tells us, Nate Dogg was originally supposed to appear as a hologram as well, but the decision was made at the last minute not to use him. Nate got a video tribute instead.