Sprite lean/angled roll with geometric consistency in multiplayer and mirrors. An ANGLEDROLL flag ties actor's sprite-rolling axis to physical direction instead of viewpoint. Y-Billboarding occurs about a rolled axis (unlike flatsprites which don't billboard). This makes roll consistent when viewed from all angles and in reflections. Useful for sprite-based laser beams and lean mechanics with third-person cameras and/or multiplayer mods.

src/playsim/p_mobj.cpp

@@ -399,6 +399,7 @@ void AActor::Serialize(FSerializer &arc)
 		A("devthreshold", DefThreshold)
 		A("spriteangle", SpriteAngle)
 		A("spriterotation", SpriteRotation)
+		A("angledrolloffset", AngledRollOffset)
 		("alternative", alternative)
 		A("thrubits", ThruBits)
 		A("cameraheight", CameraHeight)