A control panel, 18 x 12 inches (scale size) suitable for use with a simulated OO (4mm:1ft) scale layout. Customise by cloning, drawing your own diagram in the light grey area of 'Track diagram 18 x 12.tga' using your graphics program, then saving. Add switches as appropriate - look for 'DDD MR switch ...'. For a longer panel, use two or more side by side with a part track diagram on each. Tip - draw the whole track diagram first then divide into the correct size parts for each panel section. 18 polys.