Hey @LarsB,
I’m assuming you found the functions. Here is a pack for the imagery:
- EXR Images (_W.exr = AP0): https://drive.google.com/drive/folders/1v5yO6n4IocLAQ97yWefFCXWKL6Q_a6b8
- Presented Content: https://academy-vwg-gm-mitsuba-spectral-images.imfast.io/
- Mitsuba 2 Resources Repository: https://github.com/colour-science/colour-mitsuba
- Notebook to Render with Observer & Camera Sensitivities: https://colab.research.google.com/drive/1Z0BE49o9cbr7235kDs4VKijNwJl8jZsj
- Notebook to Process the Images with On-the-Fly IDT Generation: https://colab.research.google.com/drive/1oW6f0XwCZFiJYij4d6jHQCNFU1CVLnQ7
Cheers,
Thomas
PS: Nuke script for the terrible blue sphere render 
set cut_paste_input [stack 0]
version 12.1 v1
Camera2 {
inputs 0
translate {0 1 2}
focal 15
name Camera2
selected true
xpos 1280
ypos 1938
}
Light2 {
inputs 0
color {0 0 2}
translate {0 3 4}
cast_shadows true
depthmap_slope_bias 0.01
name Light3
selected true
xpos 1290
ypos 1842
}
Light2 {
inputs 0
color {0 4 0}
translate {-0.5 1 1}
cast_shadows true
depthmap_slope_bias 0.01
name Light2
selected true
xpos 1510
ypos 1794
}
Light2 {
inputs 0
color {4 0 0}
translate {0.5 1 1}
cast_shadows true
depthmap_slope_bias 0.01
name Light1
selected true
xpos 1510
ypos 1914
}
Diffuse {
inputs 0
name Diffuse2
selected true
xpos 1390
ypos 1695
}
Cube {
translate {0 -50 0}
scaling {100 100 100}
name Cube2
selected true
xpos 1390
ypos 1743
}
push $cut_paste_input
Diffuse {
name Diffuse1
selected true
xpos 1280
ypos 1695
}
Sphere {
rows 256
columns 256
translate {0 1 0}
name Sphere1
selected true
xpos 1280
ypos 1743
}
Scene {
inputs 5
name Scene2
selected true
xpos 1400
ypos 1842
}
push 0
ScanlineRender {
inputs 3
conservative_shader_sampling false
motion_vectors_type distance
name ScanlineRender3
selected true
xpos 1390
ypos 1959
}
ColorMatrix {
matrix {
{1.451439316 -0.2365107469 -0.2149285693}
{-0.0765537733 1.1762297 -0.0996759265}
{0.0083161484 -0.0060324498 0.9977163014}
}
name ACES2065-1_to_ACEScg5
selected true
xpos 1390
ypos 1983
}
EXPTool {
mode Stops
red 2
green 2
blue 2
name Exposure3
selected true
xpos 1390
ypos 2007
}