MDL: diffuse transmission renders black

[joulsoun]

Hi,
anyone have experience with the BSDFs in MDL? No matter how I try, I only get black results from df::diffuse_transmission_bsdf, doing the plastic example in the MDL handbook for instance

example:

mdl 1.3;

import df::*;

export material test_diffuse ()
= let { 
	bsdf transmit_bsdf = df::diffuse_transmission_bsdf(tint: color(1.0, 1.0, 1.0));
	material_surface mat = material_surface(
		scattering: transmit_bsdf
	);
} in material(
	thin_walled: true,
	surface: mat
);

export material test_simple ()
= let { 
	bsdf transmit_bsdf = df::simple_glossy_bsdf(1.0, tint: color(1.0, 1.0, 1.0), mode: df::scatter_transmit);
	material_surface mat = material_surface(
		scattering: transmit_bsdf
	);
} in material(
	thin_walled: true,
	surface: mat
);

test_diffuse renders black, test_simple looks sss:y. Bug?

[svetlozar.draganov]

Diffuse transmission is not supported for the moment.

[joulsoun]

I see, thank you for the reply!
Sounds like an MDL FAQ could be useful, with known unsupported stuff, I'm hitting a lot of them

[svetlozar.draganov]

That's good idea, I'll make a note about it into our Docs-project.