Roto Brush 2 is a powerful tool that allows you to separate a foreground object from a background using artificial intelligence. It can save you a lot of time and effort when you need to create mattes for compositing or visual effects. However, Roto Brush 2 is only available in After Effects CS5 and later versions. If you are still using After Effects CS3, you might wonder if there is a way to use Roto Brush 2 in your projects. In this article, we will show you how to do that using a plugin called Roto Brush 1.
What is Roto Brush 1
Roto Brush 1 is a plugin that was developed by Adobe before Roto Brush 2 was released. It works similarly to Roto Brush 2, but it has some limitations and drawbacks. For example, it does not use artificial intelligence to track the subject's movement, so you might need to refine the matte manually frame by frame. It also does not have the Refine Matte effect that can improve the edges of the matte. However, it can still be useful for some situations where you need to isolate an object from a footage quickly and easily.
How to Install Roto Brush 1
To install Roto Brush 1, you need to download it from the Adobe website[^1^]. It is a free plugin that is compatible with After Effects CS3 and CS4. After downloading the plugin, unzip it and copy the file \"RotoBrush.aex\" to the After Effects plug-in folder (On Windows, the Adobe After Effects folder is usually located in C:\\Program Files\\Adobe\\Adobe After Effects CS3\\Support Files\\Plug-ins). Then restart After Effects and you should see the Roto Brush tool in the toolbar.
How to Use Roto Brush 1
To use Roto Brush 1, follow these steps:
Select the layer that contains the footage you want to roto in the Composition panel.
Double-click the layer to open it in the Layer panel.
Select the Roto Brush tool from the toolbar (Alt/Option + W).
Select a frame where the object you want to isolate is clearly visible and not occluded by other objects.
Paint a green stroke over the object to define it as the foreground. The object will be outlined in magenta. You can use as few or as many strokes as needed to cover the object. You can also use the Alt/Option key to paint red strokes over areas that you want to exclude from the foreground.
Press Page Down or Page Up to move to the next or previous frame. The Roto Brush will automatically propagate your strokes and create a segmentation boundary between the foreground and background. You can adjust the boundary by adding or subtracting strokes as needed.
Repeat steps 5 and 6 until you have rotoed all the frames in your footage.
Go back to the Composition panel and apply any effects or adjustments to your rotoed layer as desired.
Tips and Tricks
You can adjust some parameters of the Roto Brush tool in the Effect Controls panel, such as Feather, Motion Threshold, Motion Damping, etc. These can help you fine-tune the matte quality and performance.
You can use the Freeze button in the Effect Controls panel to freeze your roto after you are done with it. This will prevent any changes or updates to your roto and speed up your rendering time.
You can use masks or other effects on top of your rotoed layer to further refine or modify your matte.
You can use Roto Brush 1 together with Roto Brush 2 if you have both versions of After Effects installed on your computer. You can use Roto Brush 1 for rough rotoing and then switch to Roto Brush 2 for finer details and refinement.
Roto Brush 2 is a great tool for rotoscoping in After Effects, but it is not available for older versions of After Effects such as CS3. However, you can still use Roto Brush 1, which is a free plugin that works similarly to Roto Brush 061ffe29dd