Level can also be a string containing a percent specification, e.g. "50%".
Please note that this is just the other way round from SetLayerTransparency() where 0 means no transparency and 255 means full transparency.
See SelectAlphaChannel for more information on alpha channels in general.
New in V2.5: You can also specify the special constant
as the level argument. If you do this, Hollywood will enable the new
vanilla copy mode. This means that all graphics commands which render
alpha channel pixels will copy these pixels directly to your brush's
alpha channel. For instance, if you select an alpha channel of a brush
and then use TextOut() to draw anti-aliased text, Hollywood will render
the exact alpha channel data of the anti-aliased text to your brush's
alpha channel where you can process it further. If
active and you draw graphics to the alpha channel that do not have any
alpha data, Hollywood will write an alpha intensity of 255 (i.e. fully
visible) into your alpha channel.
#VANILLACOPYfor special vanilla copy mode (V2.5)