RMB

RMB (Reject Map Builder) is an MS-DOS utility for building Reject tables.

The utility includes a graphical progress screen that shows color-coded detail of the map being processed; with the CPUs of the 1990s when building reject tables was a slow, CPU-intensive process, this provided convenient user feedback.

EFFECT tool
In addition to reject optimization, RMB includes a utility named  that can apply special effects to a map's reject table. This tool was used for levels such as MAP02: Sacrificium (Requiem) to make monsters behave in unusual ways. Special effects supported by the tool include:


 * BLIND: Makes monsters in a particular sector blind, for a configurable distance.
 * BLOCK: Blocks line-of-sight calculations through a specified pair of linedefs.
 * DISTANCE and LENGTH: Set limits on the distance that monsters can see, across the entire level.
 * DOOR: Identifies doors and limits the ability of monsters to see through (some number of) doors.
 * EXCLUDE: Excludes particular inter-sector lines of sight - useful for creating "safe areas" within rooms.
 * GROUP: Makes a group of sectors be considered as a single sector.
 * INCLUDE: Forces particular sight-lines to be considered.
 * LEFT and RIGHT: Allow line-of-sight calculations only through one way of a particular linedef.