Generally, variations in the surface colour, texture and finish of walls, ceilings, floors and roofs, and variations in glass and similar transparent materials are to be viewed where possible from a normal viewing position.
A normal viewing position is looking at a distance of 1.5m or greater (600mm for appliances and fixtures) with the surface or material being illuminated by ‘non-critical light’1. Non-critical light means the light that strikes the surface is diffused and is not glancing or parallel to that surface.
DIAGRAM F NORMAL VIEWING POSITIONS
Slight variations in the colour and finish of materials do not always constitute a defect
Non-critical light is defined in appendix.B3 and D7 Australian Standard AS/NZS 2589. Refer also to CSIRO TR 90/1, Report No. L8 – 1992.