code/defines/renderer.dm

RENDER_GROUP_NONE	Semantics - The final compositor or a filter effect renderer
RENDER_GROUP_SCENE	Things to be drawn within the game context
RENDER_GROUP_SCREEN	Things to be drawn within the screen context
RENDER_GROUP_FINAL	The final render group, for compositing
MOUSE_OPACITY_UNCLICKABLE	Causes the atom to ignore clicks, hovers, etc.
MOUSE_OPACITY_NORMAL	Causes the atom to catch clicks, hovers, etc.
MOUSE_OPACITY_PRIORITY	Causes the atom to catch clicks, hovers, etc, taking priority over NORMAL for a shared pointer target.

Define Details

Causes the atom to catch clicks, hovers, etc.

Causes the atom to catch clicks, hovers, etc, taking priority over NORMAL for a shared pointer target.

Causes the atom to ignore clicks, hovers, etc.

The final render group, for compositing

Semantics - The final compositor or a filter effect renderer

Things to be drawn within the game context

Things to be drawn within the screen context