Alpha in and out

In the TAB you can import clips and full-color images, or sequences of full-color images; images or clips with alpha channel information once imported will retain their transparency information.

Animation can also be exported including the alpha channel information. This may be useful when clips or animation made with the TAB have to be imported in other software for some compositing or editing.

To set the transparency of the background, assign a transparency to the Background style by using the alpha slider in the Style Editor. Once the background is fully (or partially) transparent, the opacity and transparency of the used styles and of the imported full-color images will be taken into account to create the alpha channel of the final output.

The alpha channel will be computed only when the output format supports the alpha channel information.