Using Paint and Rotoscoping Tools in Resolve Fusion

January 15, 2019

Create a clean plate to remove an item using Fusion's Clone Brush. Then mask an area, replace it, and track the replacement onto the shot.

Day 15: 25 Insights in 25 Days 2019 New Year Marathon!

Part 1: Removing an object using the Paint Tool’s Clone Brush

It’s very common for clients to ask for an object or a shadow to be removed from a shot, be that a boom mic or an item which shouldn’t be there for some reason. This is where diving into the Fusion Page is absolutely perfect because you can often do the fix quite quickly and it can be easier and more efficient than exporting/re-importing the shot to to be worked somewhere else.

For the example I’ve chosen, I’m going to remove an item that requires several steps;

  • Create a clean plate and remove the item using the Paint Tool’s Clone Brush. I show a couple of different modes for the clone brush.
  • Mask out the area to be replaced.
  • Track the replacement onto the shot.
  • Add foreground elements back in (a hand in this case) with careful masking and keying.

Clone Brush

The important thing to be aware of when using a vector paint tool is that you need to set up the controls for how the brush will behave when you start to paint and most of these controls don’t affect paint strokes you’ve already made – those controls are in the Modifiers tab. However, if you set everything up correctly in the Brush, Apply and Stroke Controls first, then your paint strokes won’t need adjusting in the Modifiers tab.

By default, the Clone brush will clone an area from its input and it will be a moving image, which may or may not be what you need. I show how you can take any input from the Flow – it could be from any tool in the Flow – and we see a potential drawback with this method, as each brushstroke always clones in from the original source. I then show the way I’ve been doing this kind of job which is to feed the Paint tool with a freeze-frame from a Time Stretcher. (In this case, the frame needed was frame 0 so I could leave it with the default value.)

Note – Using a freeze frame often means adding a Film Grain tool into the Flow, in this case it would be just after the Paint tool.

Using the Clone brush in Fusion is quite similar to the Clone tool in PhotoShop. Option (Alt) + click will select an area to clone from.

Different ways to get the same result

What I really like about Fusion is that it lets you work in a way that makes sense to you, as you experiment and learn – it can be very creative. There are usually several different ways to achieve the same thing and, if you ever change your mind, it’s usually easy to change, edit and tweak what you’ve done. Most of the time I don’t think it really matters which way you do something, just so long as it works (and it isn’t ridiculously wasteful on processing).

In this Insight, I used a Merge tool which I later wanted to connect to a Tracker but it might have been neater to actually use the Tracker to do the Merge itself since it has a foreground input and has a Match Move function.

In Part 2 of this Insight, we’ll look at some masking and keying options to help us add the foreground back on top.

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Homepage Forums Using Paint and Rotoscoping Tools in Resolve Fusion

  • andi winter

    luv this! please continue showing this type of common tasks in fusion!

  • Scott Stacy

    Well, done. This will really help me as I dig into Fusion – invaluable.

  • Jose S

    Hi Jaime, great insight! I used the same technique to remove a outlet, but the problem is, the source is 16mm Film and I need to match the grain, however, with the timestretcher the Filmgrain node I added does not work. what would be a workaround for this case.

    Thanks in advance!

  • Chrystal S

    Hi Jaime, I am having a problem tracking. I have to paint out/clone a spare tire to match the other wheel of a car. The camera moves at one point occluding the painted in wheel and then the camera follows the actor, then moves again, revealing the painted/cloned in wheel again. All in a single clip. How would you go about tracking this? Thanks.

  • Jamie Dickinson

    Hi – This sounds like you need to add the occluding object back on top (like the girl’s hand in the example above?) but it’s the tracking that you’re having difficulty with? If you’re using a single point tracker, then check out the other tutorial I have here – you need to Append the track with another track which is offset from the hidden object but which moves in a similar way (in the same plane). If you’re using the Planar Tracker, you could look at feeding a mask into it and have the mask follow the occluding object.

  • Jamie Dickinson

    Hi – Sound like you need to remove the grain before feeding it to the Tracker? You can always track the de-grained version but apply the track to a Transform which is fed from the original grainy version.

  • Chrystal S

    got a track for one clip but still having some trouble. I need to clone/paint on a frame other than the first frame. when I use the planar tracker, the transform information will not match the cloned paint regardless if I start tracking from the first frame, or the cloned frame. the regular tracker goes crazy and has been no help. any thoughts as too what I’m doing wrong or what I should try? Thank you.

  • Jamie Dickinson

    Are you using the ‘Set’ button to set your Planar tracker to go from the same frame as your clone /cleanplate frame? Also, can you make the tracking area for the Planar tracker bigger than you think you need, so as to help to find features? Tricky to tell exactly without seeing your clip. Or there’s Mocha Pro as a plugin, that’ll track anything!

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