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Lesson 6. QuickPaint > Dustbusting and Rotoscoping

Dustbusting and Rotoscoping

Dustbusting and rotoscoping are two things that you will be doing a lot of, unless of course, you work somewhere that has an army of low-paid drones to do the work for you. Dustbusting is the process of painting dirt off of an image that was introduced by the film scanning process. Rotoscoping is a frame-by-frame, hand-painting technique to create imagery over time. QuickPaint can help you perform this otherwise thankless job of wire and dirt removal.

Choose File > New Script and answer No when prompted to save the script.

FileIn the bgd.1-10#.iff, final.1-10#.iff, and wire.1-10#.iff from the Lesson06 folder.

In the Globals tab, click the Auto button to the right of the timeRange button.

Click the Flipbook icon for each clip, starting with final.

The final clip is the finished shot. The wire clip is the shot you will be painting. It has a large crane and wire suspending a stunt man, as well as quite a bit of dirt. The bgd clip is a clean plate with no rigging. This shot will be used as a source for the Reveal brush to get rid of any unwanted objects in the frame.

Highlight the wire clip and select a QuickPaint node from the Image tab.

Connect the bgd clip to the second input of QuickPaint1.

Click on the Reveal brush.

The Reveal brush will expose whatever is in the second image input. If no second image input exists, it acts as an Outside node, punching a hole through both the paint and the first input source.

Make sure that you are in Persist mode for the first strokes you will be painting.

The crane on the left side of the screen and the stationary car in the foreground need to be painted out on every frame. In Persist mode, you can paint out these objects on only one frame, but the strokes will be drawn for the entire sequence.

Go to frame 10 and paint out the crane and tree on the left side of the screen, the car in the foreground, and the entire cloud area in the sky.

Since you are in Persist mode, you will only have to Paint these areas once.

Set QuickPaint back to Frame mode.

The remaining paint work you will be doing is on a frame-by-frame basis.

Go to frame 1 and paint out the remainder of the wire connecting the stuntman.

You might want to zoom in and center on the stuntman to see the wire more closely. In some cases, you may need to paint over your strokes several times to get adequate coverage.

Continue to paint out the wire on frames 2–10.

Make a flipbook of what you have done so far.

Hopefully, the wire and crane are gone and there is no flickering. Flickering is caused by strokes painted in Frame mode that don't completely cover the wire.

But what about the dirt—the small white flecks that appear in different areas of the frame? You will need to remove the specks using the same process outlined in steps 12 and 13.

Go to each frame that contains dirt and paint it out.

Make another flipbook.

If the wires and rigging are gone, if the dirt is gone, and if there is no flickering—congratulations. If not, you're not leaving until it is perfect.

Quit Shake.



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