Geometry files have an optional section MARKERS where non-acoustical elements can be added for the visual presentation. These markers are easy to use (same principle as defining planes), can have arbitrary colors, patterns, and be offset from planes.

Markers are of types: 

LINE, a 3D multi-point planar line 
DASH, a 3D two-point line 
POLY, a filled planar 3D polygon 
CIRCle, a 3D circle 
DISC, a 3D disc (filled circle) 
TEXT, 3D vector text with selected width and height 
RULE, a 3D rule or (ruler) with selected tic spacing 
Example use: 

CORNERS 
... 
PLANES 
... 
MARKERS ;optional section 
;type co-ids  RGB-color    offset 
 POLY 1 2 3 4 {173 179 77} 0.0 
 LINE 1 2 3 4 1 {90 90 90} 0 
 DASH 11 1 2 {0 90 90} 0.1 
 POLY 11 12 2 1 {173 179 77} 0.0 
 CIRC 20 12 13 {  0   0   0} 0.01 0.12 
 DISC 20 12 13 {200 200 200} 0.01 0.12 
 RULE 11 12 13 {200 200 200} 0.01 1.0 
 TEXT 3 2 12 {255 0 0} 0.01 "Wall" 0.04 0.02 

Corner id:s given are are used to define a plane that the markers can be offset from or to define the direction of TEXT. For example, the DASH is defined from corner 11 to 1 but it  is offset 0.1 m from a wall defined by plane 11 1 2). 

Note that also string constants can be used: 

LOCAL blue = "{0 0 255}" 
... 
POLY 1 2 3 4 %blue% 0.0 
and CATT-Edit can be used to select and insert the RGB color triplet visually. 

A geometry can be exported as a Marker-file (. MRK) and such files can then be inserted in another MARKERS section, translated and rotated into the desired position: 

LOAD, loading an MRK-file 
Sample use of this feature is to create e.g. a chair once as an MRK-file and then LOAD one or more instances of the chair into other projects as markers: 

MARKERS 
 LOAD 1 2 3 "chair.MRK" 
 LOAD 12 23 "chair.MRK" 

where bolded corner id:s are used to defined the new coordinate system (to place with z upwards only two id:s are needed). 

Marker-files can indirectly be made in AutoCAD via the AutoLISP interface and then modified in GEO-format and exported as a marker-file. A directive NOROOM can be used if a GEO-file is used only to create a Marker-file (no source and receiver files necessary, no calculations made). 

Markers can be switched off while editing and displaying a model. 

Useful marker objects will gradually become available for download including GEO source for parametrical variation.

Marker-files are also used for loudspeaker "visuals".
 

- TEXT example -
 


- LOAD example -
 


- TEXT example -
 


- TEXT, LOAD, CIRC, DISC, LINE example -
 


- An MRK-file used for source visuals -
 


- An MRK-file used for array visuals -