Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: naikku on 2014-03-10, 09:40:02

Title: Farm/animation-rendering of a building - Grass needed :)
Post by: naikku on 2014-03-10, 09:40:02

I´m doing some pics for my dad, he is building storage/workplaces here in Finland and I got the 2D-DWGs.
(http://www.harrasteparkki.fi/pics/10.jpg)

I did a very basic animation, camera just flew over  the buildings and came back. I used our small farm at my work to render it.
The trees are Corona_scattered and one farm-comp didnt understand it, all the frames it rendered had the trees in
different places. -Dont have any idea why- need to re-render it.

Anyways, I would be interest to know if anyone has good suggestions for how to render a decent grass for this?
I havent checked the dailybuilds - do they support hair/fur? If yes, can I deploy/install a dailybuild to all 7 computers?

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: johan belmans on 2014-03-10, 10:05:48

try it with this one

http://www.themantissa.net/blog/2014/2/17/grass-generator-update

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: LKEdesign on 2014-03-10, 10:07:57

HI Naikku,

Vizpeople has a very thorough tuturial about making realistic grass. The tutorial is based on Vray and Multiscatter but can easilly be converted to other renders like Corona. Convert the grass patches to Corona Proxies and scatter them corona_Scatter.

http://www.viz-people.com/tutorials/168-photorealistic-grass-tutorial (http://www.viz-people.com/tutorials/168-photorealistic-grass-tutorial)

While you are at it, I'll suggest that you go to HQ Plants and download some of the free sample trees. They are in real 3D and not just planes with an opacity map. Convert the materials to Corona , convert the tree to CoronaProxies and you will have a far more realistic scene.

http://www.3dmentor.ru/free-models.html (http://www.3dmentor.ru/free-models.html)

P.S. Evermotion have a lot of sample plants to in their various arcmodel shopping pages.
http://www.evermotion.org/modelshop (http://www.evermotion.org/modelshop)

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: Tanakov on 2014-03-10, 10:23:16

Dont use Evermotion, their models are just simply too heavy and they render years.

To get to the daily builds read some more topics on forum, its not that hard to find.

Ps. Read this.

http://forum.corona-renderer.com/index.php/topic,317.0.html

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: Ludvik Koutny on 2014-03-10, 12:00:08

Most efficient way is to model a one or a few grass patches, like these:

(http://rbcdn.polytown.netdna-cdn.com/wp-content/uploads/2011/11/Patches.jpg)

And scatter them around using CoronaScatter :)

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: Dervish on 2014-03-10, 12:36:16

very simple.

Get the free grass models of the 3dmentor ru link, then use corona scatter. Job done.

OR use forest lite, but it only works on flat patches.

My bad I missed Rawalanche's comment.

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: blank... on 2014-03-11, 10:38:36

If you're rendering only from this far away ask yourself do you really need 3D grass, or could you get away with texture only? One trick is to use grass texture, with it's noise turned on. This way you get no tiling and you don't need UVW mapping. Like this:
http://i.imgur.com/MucpjK8.jpg

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: Tanakov on 2014-03-11, 11:29:09

Great Advice, I will use it on some of my walls.

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: naikku on 2014-03-11, 11:32:24

Quote from: blank... on 2014-03-11, 10:38:36

If you're rendering only from this far away ask yourself do you really need 3D grass, or could you get away with texture only? One trick is to use grass texture, with it's noise turned on. This way you get no tiling and you don't need UVW mapping. Like this:
http://i.imgur.com/MucpjK8.jpg

Well. True. I shall try that trick. Thank you everyone for your advises.

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: naikku on 2014-03-13, 09:09:41

The bitmap with a lot noise works fine. I also tried the GrassGenerator.script and it works also very good. You can look at this:
http://harrasteparkki.fi/pics/hp-iso.jpg (http://harrasteparkki.fi/pics/hp-iso.jpg)
It is a 5000x2320 render with a small grass-patch scattered 1million times ranging from 100-800% scale. And turning 0-180degrees.
I didnt use time to make different color grassneedles so it is just a simple...test. Rendered to 40 passes only / to me it was ok..

What I do like A LOT about this? When trying with MR + Hair&Fur, it took a loooooooooooong time to render a picture. To me it seems like it is no deal to Corona Renderer.
One hundred million gazillion grass needles !
(http://mcntalk.files.wordpress.com/2013/07/dr-evil.jpg)

Title: Re: Farm/animation-rendering of a building - Grass needed :)
Post by: blank... on 2014-03-13, 19:35:28

Quote from: naikku on 2014-03-13, 09:09:41

What I do like A LOT about this? When trying with MR + Hair&Fur, it took a loooooooooooong time to render a picture. To me it seems like it is no deal to Corona Renderer.

You're comparing apples and oranges here. You could have easily use grass generator with MR too.