Hi Those parameters do the same thing and have the same meaning in any of the Arnold plugins.
In general, the mailing lists are customer-only. Thanks Stephen Solid Angle Support On Mon, Nov 30, 2015 at 6:46 PM, Sebastien Sterling < [email protected]> wrote: > Thanks Steven, am of to digest all this :) > > I know that they both have exposure and intensity. > > the impression i got in sitoa is that you can leave exposure at it's > default, and just ramp up the intensity, as explained in the guide > > "If you are not used to working with exposure in the lights, you can > simply leave the exposure parameter at its default value of 0 (since 20 = > 1, the formula then simplifies to: color * intensity * 1)." > > I get from this that exposure is for people who like to work with camera > terminology. > > > In Mtoa, it feels like "Exposure" is a far more important parameter. i was > just concerned if this affected physical accurate lighting in any way. in > the past i've seen both schools of thought clash. > > Is there still an Arnold list to put these kind of questions too ? and if > so, how does one get an invite ? > > > Thanks again for the full answer ! > > > > > On 30 November 2015 at 22:26, Stephen Blair <[email protected]> > wrote: > >> Hi >> >> The only differences in a default spot light are the default >> spot_light.cone_angle and the spot_light.samples. >> >> >> - MtoA sets the cone_angle to 40 (the Arnold default is 65) >> - SItoA sets the samples to 2 (the Arnold default is 1) >> >> >> Here's the non-default settings from ASS files exported from Maya and >> Softimage: >> >> # MtoA default >> spot_light >> { >> name spotLightShape1 >> cone_angle 40 >> } >> >> # SItoA default >> spot_light >> { >> name Spot.SItoA.6000 >> samples 2 >> } >> >> And here's the Arnold defaults: >> >> # Arnold defaults >> kick -info spot_light >> node: spot_light >> type: light >> output: (null) >> parameters: 33 >> filename: <built-in> >> version: 4.2.11.0 >> >> Type Name Default >> ------------ -------------------------------- ----------------------- >> >> POINT[] position 0, 0, 0 >> POINT[] look_at 0, 0, -1 >> VECTOR[] up 0, 1, 0 >> FLOAT radius 0 >> FLOAT lens_radius 0 >> FLOAT cone_angle 65 >> FLOAT penumbra_angle 0 >> FLOAT cosine_power 0 >> FLOAT aspect_ratio 1 >> ENUM decay_type quadratic >> MATRIX[] matrix >> RGB color 1, 1, 1 >> FLOAT intensity 1 >> FLOAT exposure 0 >> BOOL cast_shadows true >> BOOL cast_volumetric_shadows true >> FLOAT shadow_density 1 >> RGB shadow_color 0, 0, 0 >> INT samples 1 >> BOOL normalize true >> BOOL affect_diffuse true >> BOOL affect_specular true >> BOOL affect_volumetrics true >> FLOAT diffuse 1 >> FLOAT specular 1 >> FLOAT sss 1 >> FLOAT indirect 1 >> INT max_bounces 999 >> NODE[] filters (empty) >> FLOAT[] time_samples (2 elements) >> INT volume_samples 2 >> FLOAT volume 1 >> STRING name >> >> >> A light has Intensity and Exposure parameters, both in MtoA and in SItoA. >> >> >> >> Thanks >> >> Stephen >> Solid Angle Support >> >> On Mon, Nov 30, 2015 at 4:50 PM, Sebastien Sterling < >> [email protected]> wrote: >> >>> Hey List have been messing around and comparing Mtoa with Sitoa >>> >>> Is it just me or is Penumbra a very different thing in each versions ? >>> >>> sitoa feels like you start from scratch, absolute zero, and work up, >>> Mtoa feels like you just walked into a previously saved preset. it looks a >>> little nicer, but i can't shake the niggling feeling that it starts from a >>> stylized/physically inaccurate base. >>> >>> Does anyone know how to soften the falloff on a spotlight ? >>> >>> Cause Penumbra doesn't seem to do that in Mtoa. >>> >>> and is exposure in the Arnold settings in Mtoa = to The light intensity >>> in Sitoa ? >>> >> >> >
