Some are done from memory. Others needed references. It depends on the character. More iconic characters, like Prime and Megatron, were done from memory.
ROUND 2 - TRANSFORMERS: REVENGE OF THE FANART
This piece is based on a Megatron toy I have in my collection.
"Bulkhead, I needed
FAMILY DOLLAR BUMBLEBEE
This is another piece based on a toy in my collection.
He's pretty much the Sonic the Hedgehog of the Autobots, so much so that I wrote my fanon incarnation's personality based on Sonic's. That kinda seems to be the way modern incarnations are going. It makes sense.
"Well, I'm prepared...to give Megatron a nickel-plated knuckle sandwich!"
G1 PRIME (AGAIN)
G1 GALVATRON (AGAIN)
He might be shooting at you...or one of his own men. He's that crazy.
I think he may be my favorite Decepticon in the Prime series. At least he gets some of the best one-liners. "You painted my paint job! PREPARE FOR SURGERY!"
G1 RODIMUS PRIME (AGAIN)
"Now...light our darkest hour!"
G1 PERCEPTOR EXAMINES A CHAOS EMERALD
"Fascinating! This crystal is emitting incalculable quantities of esoteric energy."
I got this idea from a friend's Tweet of a photo of Wheeljack holding a Chaos Emerald. He captioned it with Jackie talking about using it to power his latest invention. Wheeljack and Perceptor are both bots of science, so yeah.
He might be shooting Autobots, but, judging by that smirk, he might be shooting Megatron in the back.
I didn't base this on any one incarnation, but every incarnation shares various design cues, such as fans on her wings, a geisha-inspired head, and a red, black, and teal color scheme.
Here's that OC again. He transforms into my mother's favorite classic car, a 1955 Thunderbird.
MY OPTIMUS PRIME
This is my take on the leader of the Autobots. It's based on a Hot Wheels/Matchbox-scale semi I've had for years.
MY PRIME UNMASKED
In keeping with the trend started by the live-action movies, my Optimus only has his faceplate on when in battle. Don't worry. Cybertronians can't get COVID.
This is my main Transformers OC. He's an artificial Transformer built on Earth by humans (unless the RP I'm using him in forbids that).
SKYBOLT - ALT MODE
I originally planned for him to transform into a Predator drone, but decided instead to make him a fictitious UAV that's a cross between a Predator and an F-15. It better suits his Seeker-esque transformation scheme.
Skybolt, being artificial, is still figuring out emotions, so smiles are rare for him. When he does smile, it lights up his face.
Sometimes, strong emotions can completely overpower Skybolt. Kill a close friend of his, and prepare to see this face.
Quintesson Judge: Silence, or you will be held in contempt of this court!
Hot Rod: I have nothing but
contempt for this court!
- Transformers the Movie (1986)