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 < sebastien.sterl...@gmail.com> 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 ? >