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 ?
>
