Invisible Material

focpt · 3 Mar 2011, 04:14

Greetings,

I discovered how to render materials invisible, but with shadows still showing. This would be helpful for situations where you want to add trees in photoshop post process.

Cheers,

Tobobo · 3 Mar 2011, 13:49

Thats Brilliant!!!

How did you find that out?

focpt · 3 Mar 2011, 14:35

@tobobo said:

Thats Brilliant!!!

How did you find that out?

Just some experimentation. Really, I started randomly pressing buttons like a monkey - rendering each time.

thomthom · 3 Mar 2011, 14:48

Note that the material will be visible in reflections and refractions.

focpt · 3 Mar 2011, 15:30

@thomthom said:

Note that the material will be visible in reflections and refractions.

Right, so in a window you would see the reflection of that green cartoon tree.

AcesHigh · 3 Mar 2011, 23:07

@thomthom said:

Note that the material will be visible in reflections and refractions.

what about the checkbox right below that one? (Exclude All Materials from Reflection/Refraction)

andybot · 8 Mar 2011, 04:15

@AcesHigh

indeed, the exclude materials checkbox works pretty well. First image

Here is the option of visible only in secondary for the tree material

The mirror material has the exclude materials from relfection/ refrac. option checked (optimize exclusion didn't seem to make any difference)

focpt · 9 Mar 2011, 16:45

Thanks Andybot for completing the experiment. Now we know.

tovel · 25 Mar 2011, 10:30

Hello,

I have v-ray to Sketch-up 7,
I can´t find the option "only visible in secondary"
in the material editor. Could it be I have an old version?

focpt · 25 Mar 2011, 20:31

@tovel said:

Hello,

I have v-ray to Sketch-up 7,
I can´t find the option "only visible in secondary"
in the material editor. Could it be I have an old version?

What version do you have? Latest is 1.49.x

fjrentas · 5 Apr 2011, 14:08

The problem with exclude object form the reflection is that you will exclude all the object.