Avoid Over Dense Mattes Using Ultimatte Advantedge
An Ultimatte Advantedge Smart Matte Sizing allows users to figure out the matte density without making it overly dense. To use this tool, users just need the latest version of Ultimatte Advantedge, a background screen and either a camera or camcorder.
Step 1: Compositing Traveling Mattes
Mattes are what are used in compositing two images or clips. A subject will be placed in front of a green, orange or blue screen and then the clip or image will be taken. The background screen should contrast with the foreground image, but still match something in the new background.
These screens are referred to as mattes since they need to be non-reflective. If they do have a reflective surface, it could reflect light into the camera.
Traveling mattes are mattes that change to reflect the movement of a person or object. Since these mattes are constantly changing, it is hard to correctly composite them. Oftentimes, they look over-dense and this can cause the final image to look too dark or just unrealistic.
Step 2: The Effects of Overly Dense Mattes
Sections of matte can get too dark because of improper lighting or imperfections in the matte itself. The problem with this is that these darker areas will show up in the final composite. And, they generally show up as oversaturated areas or just dark splotches in the scene. So, they need to be remedied before the final composite. This is where the Smart Matte Sizing tool can be used.
Step 3: Using the Smart Matte Sizing
If the matte on a particular shot is overly dense, it can be opened up in Ultimatte Advantedge, and then select Smart Matte Sizing from the features. Then, the option can be run to fix the overly dense area.
Then, the image can be composited and it should look better up against the new background.
Step 4: Chroma Key Filter Tool
Once the matte has been fixed, users can select the Chroma Key Filter tool to remove the background from the image. This filter is meant to work the first time so the entire background should be removed. If any lingering color from the background still remains, it can be scrubbed out.
Look at the foreground without the background. If the Smart Matte Sizing was successful, the image should look even and clean. If it did not, there could be darker areas in the foreground image. If that is the case, try running the Smart Matte Sizing again on the original image.
Step 5: Adding Back in Shadows
If the Smart Matte Sizing and Chroma Key Tool were successful, the new image should show up nicely on the new background. But, some shadows may have been lost when the images were composited. To add these shadows back into the final composite, use the Spill Ratio slider.
Try moving the slider back and forth until the shadows start to reappear. Generally, if the slider is moved to around 40, the shadows should come back into the shot.