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William F Pokorny <ano### [at] anonymous org> wrote:
> On 09/23/2017 08:19 AM, Ive wrote:
> >
> > From what I can tell, especially aimed at architectural
> > pre-visualisation,
>
> So these could likely be a little sloppy. Good to know.
two open source available implementations:
http://www.luxrender.net/wiki/LuxRender_Lighting#IES_data
If in doubt, a good compromise to not go as far as full IES support is also to
look at Blender's custom curves light attenuation where a spline commands the
blending of a spotlight from center to edge of cone:
https://docs.blender.org/manual/ja/dev/render/blender_render/lighting/lights/light_attenuation.html#custom-curve
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