From ZDoom Wiki
A_OverlayAlpha (int layer, double alph)
Sets the alpha of the overlay specified. Requires A_OverlayFlags' PSPF_ALPHA set to true to have any effect.
- layer - The layer to modify.
- alph - The alpha for the layer to have.
|Note: This article lists no examples. If you make use of this feature in your own project(s) or know of any basic examples that could be shared, please. This will make it easier to understand for future authors seeking assistance. Your contibutions are greatly appreciated.|