Shade
The actor/wall-in-question's shade. Shade is available for the sprite structure and wall structure. Legal values are between -127 and 128 with 0 being default brightness and negative/lower values being brighter.
Note: Negative values don't appear obviously brighter but instead cause the actor/wall to be less affected by changes in visibility.
Related structure members include floorshade and ceilingshade.
See also spriteshadow and spritenoshade.