Console variables (cvar) are variables “built-in” to the engine. The direct way to change and/or query their values is with the command line interface of the console. Most variables accept values only within a preset range appropriate for that variable.
Displaying the value of the variable con-fps in the console:
Changing the value of the variable con-completion from the console (to 1):
Changing the value of the variable rend-particle-rate with force from the console (to 10):
rend-particle-rate force 10
Forcing the value of a variable is not generally a good idea. Doing so tells Doomsday to ignore the predetermined accepted value range and sets the value regardless. This feature exists primarily for development purposes.
if con-snapback = 0 "Console snapback is disabled" "Console snapback is enabled"