load_dict bsdf

[zichenwang01]

Hi,
I am having a bit of trouble loading a custom bsdf. Here is my attempt

bsdf : mi.BSDF = mi.load_dict({
            'type': 'diffuse', 
            'reflectance':  mi.Color3f(0.8, 0.2, 0.2)
        })

and the problem I get

RuntimeError: ​[xml_v.cpp:341] Unkown value type: <class 'mitsuba.cuda_ad_rgb.Color3f'>

I looked at https://mitsuba.readthedocs.io/en/latest/src/others/bsdf_deep_dive.html but did not instructions for loading reflectance that has more than 1 number.

Thanks!

[njroussel]

Hi @zichenwang01

The plugin pages (for BSDF) always have snippets of examples to initialize plugins from XML or Python dictionaries.

Here's what you want to be doing:

bsdf : mi.BSDF = mi.load_dict({
            'type': 'diffuse',
            'reflectance':  {
                'type': 'rgb',
                'value': [0.8, 0.2, 0.2]
                #'value': mi.ScalarColor3f(0.8, 0.2, 0.2) <- This is also valid
            }
        })