Linedef type 603

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Linedef type 603, Adjustable Flickering Light, is a type of linedef special which causes the light level of every tagged sector to flicker randomly. This is useful for creating a lighting effect that mimics flames.


The controlling linedef's length determines the frequency of flickers: four fracunits of length correspond to one tic of time between flickers. The standard frequency is 16 fracunits (4 tics). Both the control sector's and the target sector's brightness levels affect at which brightnesses the light flickers. The lesser brightness level between the two determines the minimum light level for this effect, while the greater brightness level determines the maximum.


Example WAD: ex_ld603_adjustableflickeringlight.wad
  • This example WAD can be played in any gametype. It uses MAP01, replacing Greenflower Zone Act 1.
  • This example WAD has three rooms, each containing a flickering light effect with slightly different settings.
  Linedef types – Lighting [view]
Floor LightingCeiling LightingAdjustable Pulsating LightAdjustable Flickering LightAdjustable Blinking Light (unsynchronized)Adjustable Blinking Light (synchronized)Colormap