It's in the genes.

Here’s a rewritten version of your statement with a more fluid and engaging flow, while preserving the sentiment:

I guess you could say my brothers and I were born with a creative streak—our dad was naturally artistic, so it must run in the family.

From the moment I could hold a pencil, I started drawing. I would sketch movie stars from old Photoplay and Film Review magazines, and copy the dynamic comic art of Frank Frazetta and Boris Vallejo. In my teens, I was also captivated by the bold pulp illustrations of Robert McGinnis and the amazing sci-fi illustrations of Chris Foss. I can still picture my brother Robert and me sprawled on the bedroom floor, a jumble of pencils and felt-tips scattered between us, listening to movie soundtracks while we drew for hours on end.

Art was the only subject at school that really resonated with me. But my confidence took a knock because teachers were always comparing me to my brothers, who’d gone before. Back in the 70s, teachers could be so harsh. School was not a happy place for me.