Background Key
Background Key removes a chosen color from a grid, so only the rest of the picture is projected. It’s most useful for videos with a solid background.
New grids start with the key on and keying out black, at the smallest threshold. Pure black is already treated as transparent, which is usually what you want for projection: black doesn’t light up anything.
Controls
Section titled “Controls”| Control | What it does |
|---|---|
| Enable switch | Turns the key on or off for the grid. |
| Key color (preview with R, G, B sliders) | The color to remove. |
| Threshold | How close to the key color a pixel must be to be removed. Low removes only the exact color; higher removes similar shades too. |
| Reset (trash can) | Back to a new grid’s defaults: key on, black, smallest threshold. One undo step. |
Which grid?
Section titled “Which grid?”The arrows at the top of the panel choose the grid. Modify All Grids applies changes to all of them. Settings are saved with the project, per grid.