Free Airbrushing Resources: Here are more photos of fire and flames to use for reference shots when custom painting your realistic flames.
Fire!
Fire!
Inferno fire
Real flames airbrushing photo reference shot
Red flames airbrushing photo reference shot
Be sure to think about the chaos of the flames' curves, the translucent nature of the flames, their bright spots in the, mixture of sharp curves and smoky curves, the variegation of color from orangish-red to reddish-orange then bright orange and very bright orangish-yellow with nearly white bright hot spots.