scottmoore Posted May 12, 2017 Share Posted May 12, 2017 I am curious as to what sets the physical placement of the "gobo geometry" in a lighting Instrument? I added a gobo to a very small fixture (GLP X4S) and the gobo geometry sits about 18" out in front of the lighting fixture. This is a custom symbol and not a VW Spotlight symbol. In creating symbols, I am not aware of any step or steps that are used to determine that location so I suppose my assumption is the geometry is placed automatically in a fixed location from the light source? Just curious. Quote Link to comment
JBenghiat Posted May 12, 2017 Share Posted May 12, 2017 3D geometry for a Lighting Device symbol usually has a 3D locus at the tilt pivot point of the light. I believe that this is where the render light gets placed, and the gobo at the appropriate distance to cast a shadow on the beam. See the following: http://app-help.vectorworks.net/2017/eng/index.htm#t=VW2017_Guide%2FLightingDesign1%2FLighting_Instrument_Specifications.htm HTH, Josh Quote Link to comment
scottmoore Posted May 13, 2017 Author Share Posted May 13, 2017 All of the above is correct, but I am still not entirely sure how the gobo geometry gets placed. I suppose there is a default distance from the actual light object as created by a subscript of some sort. If that is the case, my assumption is that the geometry is placed at a specific distance from the light source. In the instance mentioned in my opening post, the geometry was pretty far out. Curious as to why. Thanks. Quote Link to comment
JBenghiat Posted May 13, 2017 Share Posted May 13, 2017 I believe the size of the gobo remains constant, so the field angle will determine the distance from the gate. If you have a narrow angle and a relatively short barrel, that probably would produce the results you're seeing. -Josh Quote Link to comment
scottmoore Posted May 14, 2017 Author Share Posted May 14, 2017 Aha, well that does make sense. Thanks!! Quote Link to comment
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