A similar effect can be achieved with a 1-bit alpha channel, as found in the 16-bit RGBA high color mode of the Truevision TGA image file format and related TARGA and AT-Vista/NU-Vista display adapters' high color graphic mode.
Similar results can be attained by employing a 1-bit alpha channel, similar to the 16-bit RGBA high color mode utilized in the Truevision TGA image file format and associated TARGA and AT-Vista/NU-Vista display adapters for graphics output.