Objects in transparent object rendering with black material

Forums Technical Discussion Objects in transparent object rendering with black material

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deadalvs: Member; 196 posts; Joined: Aug. 2011; Offline

March 27, 2018 5:17 p.m.

Hi all,

I'm rendering this artsy scene (attached hip file) .. but even though I have orange and white colors for the inside geometries, they render with a black material… what could this be?

Any input welcome. Thanks!
m.

Attachments:
artsy.hip (803.6 KB)


Adriano: Member; 411 posts; Joined: June 2015; Online

March 27, 2018 8:59 p.m.

Your outer torus object enveloping the rest of your geos does cast shadows onto the little spheres and wires in the middle, blocking the light entirely. Consequently they come out black.

Cheers,

A.

Edited by Adriano - March 27, 2018 21:17:07

Attachments:
artsy_01.hiplc (777.2 KB)


deadalvs: Member; 196 posts; Joined: Aug. 2011; Offline

March 28, 2018 1:35 a.m.

hmm, but I’m raytracing, so shouldn’t the shadow be ‘transparent’ with a glass material?

is there a specific setting for this?

thanks for the help so far!


huey_yeng: Member; 69 posts; Joined: Nov. 2016; Offline

March 28, 2018 3:15 a.m.

If you enabled Fake Caustics under Opacity tab in the principled shader, it should fix that issue if I'm not mistaken.

Assuming you're using principled shader as I encounter it before when practising Mantra rendering.


Adriano: Member; 411 posts; Joined: June 2015; Online

March 28, 2018 10:24 a.m.

deadalvs
hmm, but I’m raytracing, so shouldn’t the shadow be ‘transparent’ with a glass material?

is there a specific setting for this?

thanks for the help so far!

You asked “why” things come out black when not painted black and i can look up the sky at night and answer. But if you ask why “Why”? …Can't help.

I don't know a thing about raytracing nor Mantra for that matter, never rendered a single project with it, never will.

But i found that thread might be interesting to you.

http://forums.odforce.net/topic/28392-rendering-in-mantra-newbie-questions/ [forums.odforce.net]

Cheers,

A.


deadalvs: Member; 196 posts; Joined: Aug. 2011; Offline

March 28, 2018 1:10 p.m.

Haha - love the reply! WHYYY???

Sometimes we just search for the right answers in the wrong place.

Cheers!
m.

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