Here's an excerpt from a typical Moore script, from the first League of Extraordinary Gentlemen. Note that this is a description of what Kevin O'Neill is to draw in a single 3-inch-square panel, one of six on the page:

Now we close in a little more. All we can see of Quatermain now is a sliver of his profile over to the left of the panel, looking away from us with widening eyes and an expression of dawning mute shock towards the background, across the other side of the counter. To the right of the middleground, we can see the Si Fan guy looking angry and agitated as he waves the half-melted brush under Shen Yan's nose. We can't see much of Shen Yan, since he is nearly off the right of the panel here, but what we can see of him looks abashed and apologetic. More to the left centre of the middleground, the door behind the counter has now swung open even wider. Looking through it we see a terrible, bizarre, and at first confusing scene. Sitting on an ornate stool with his back to us, wearing a long and magnificent looking robe and a mandarin's pillbox hat, his pig tail hanging down the back, we see a rear view of our devil doctor. In his right hand he holds up a paintbrush. The tip of it, thick with paint, is smouldering. Standing on the floor to our right of the seated doctor we see a kind of raised pot or brazier. Smouldering in it is some sort of thick and caustic liquid. The doctor pauses with his brush in hand as if he were an artist considering his next stroke. In the background beyond the seated doctor, hanging with his wrists bound together and attached to a beam above his head, we see a terrified and agonized looking Chinese man who is stripped to the waist and facing us over the top of the doctor's head, which is turned away from us. There is a gag in the man's mouth, so that he cannot scream. His black hair is plastered to his forehead with sweat, and sweat stands out in beads on his brow. This is Ho Ling, a minor opium trader of Limehouse mentioned in Thomas Burke's "London Nights" if you're even remotely interested. He is quite a big man, maybe running slightly to flab. Painted in a vertical row down the middle of his naked chest are a number of Chinese characters (again, I'll have to wait until I've consulted Steve Moore before I can tell you what they actually are). All of these characters are smoking and smouldering. They are painted onto the man's chest in some sort of terrible acidic, caustic goo that the devil doctor is using instead of paint. Over to the right, the Si Fan guy and Shen Yan continue their Chinese conversation.