Grass test

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Pikadili89
Posts: 114
Joined: Wed Jul 11, 2012 1:19 am

Grass test

Post by Pikadili89 » Wed Mar 22, 2017 8:59 pm

Hi guys, I am attaching test render of grass I did yesterday in SketchUp. Personally, this is my best vegetation render by far! :D c&c are welcome as always!

Cheers!

Milos
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Trava - test.jpg

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Oscar J
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Posts: 2204
Joined: Sat Mar 31, 2012 3:47 am
Location: Gothenburg, Sweden
3D Software: Blender

Re: Grass test

Post by Oscar J » Wed Mar 22, 2017 9:54 pm

Quite nice - did you use Skatter, or the Skindigo scatterer?

I do think the strands look a little dry. I would try to make them a tad more reflective and "juicy". :)

Pikadili89
Posts: 114
Joined: Wed Jul 11, 2012 1:19 am

Re: Grass test

Post by Pikadili89 » Wed Mar 22, 2017 10:31 pm

Hi Oscar, I used Skindigo Scatterer.

I agree on grass, I made it as phong transmitter, opacity was set to 70%. And parameters was something like 1.25 IOR and 150 exponent. with slight bump. :)

Eneen
Posts: 169
Joined: Thu Jan 21, 2016 9:32 am

Re: Grass test

Post by Eneen » Thu Mar 23, 2017 12:08 am

I think, that making IOR 1.45 for fresh and 1.55 for dry is pretty accurate.
Take a look:
https://www.indigorenderer.com/forum/vi ... 23&t=14146

Pikadili89
Posts: 114
Joined: Wed Jul 11, 2012 1:19 am

Re: Grass test

Post by Pikadili89 » Thu Mar 23, 2017 12:27 am

Woah, thanks Eneen, that is quite a detailed document for herbs in renders! :D

Eneen
Posts: 169
Joined: Thu Jan 21, 2016 9:32 am

Re: Grass test

Post by Eneen » Thu Mar 23, 2017 1:54 am

That's indeed good doc. I was looking for plants IOR for really long and that made my day. Best part is that knowing difference between live and dead leaf one can control reflection pretty accurate.
When used first time it seems that leaves are too reflective with 1.45, but it's ok for sure. That 1.55 is ok for wood too.

Pikadili89
Posts: 114
Joined: Wed Jul 11, 2012 1:19 am

Re: Grass test

Post by Pikadili89 » Thu Mar 23, 2017 5:58 am

True, but exponent is playing equally same roll if you ask me. What is the usual that you use? I found that 100-350 is playing the best for the herbs, since there is huge variety of different herbs and plants.

As for the wood, I usually use 1.30 - 1.75 IOR for treated wood and very low ones for barks.

Eneen
Posts: 169
Joined: Thu Jan 21, 2016 9:32 am

Re: Grass test

Post by Eneen » Thu Mar 23, 2017 6:35 am

I'm trying to build external leaf material database and usually set roughness about 0.7.

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