How do I go about adding this objective style marker?

[Gunrock]

How do I add these marker styles from tormentor's "City of the Damned Apocalypse mod?

 

 

[Barry Burton]

Make a new actor in ZScript or Decorate with a graphic like that. Give it the +FLOATBOB property if you want it to bob up and down. Then just place them over your specific points of interest in your map.

 

If you want it to do something when the player uses it (like a switch) just have it do an action special when the player presses Use.

[Gunrock]

Outstanding!!! Thank you!!!