Animgirl,
I’ve not done much "painting" in Photoshop, so perhaps the two tools have more similarity than I realize. But, I would expect the brush to be more opaque in the editing effect it produces, while the airbrush is less so since the intent is to simulate the application of paint applied from some distance through the air. The airbrush provides a continues edit (steady spray of paint) while the regular brush is static, laying down only a certain amount of paint wherever it touches the canvas. The "closer" the spray nozzle is to the canvas, the more opaque the effect. Also, the airbrush quite likely produces softer edges with a more pronounced dithering effect as you move out from the center.
I hope that doesn’t sound like I’m just repeating the obvious…I’d better go give both brushes a few strokes to see for myself. Also, keep in mind that the brush styles can greatly modifiy the effect of the regular brush such that it would perhaps seem to approach the same effect produced by the airbrush.
Regards,
Daryl
In my typical style, I’m going to condense Daryl’s comment <grin>.
Without airbrush, you lay down "ink" with each mouse click. With airbrush enabled, you lay down ink until you release the mouse button – the length of time it lays down ink and the degree of fade is driven by the options in the Options Bar at the top.
Peace,
Tony
