Jump to content

Hair and fur (grass) material problem in mental ray.


Christ1982
 Share

Recommended Posts

Hi,

I know there are many threads on here dealing with the hair and fur modifier being used to create grass, but from what i can tell nothing has come up dealing with this problem!

 

I have finally managed to get the grass to the correct length, not quite the correct density, but i know how to work on that, but the grass is not coming out the colour that i am selecting in the modifier...

 

Obviously i want it to be green and it keeps coming out as nightmare black grass!!

 

Anyone got any ideas?

 

[ATTACH=CONFIG]38466[/ATTACH]

Link to comment
Share on other sites

as a follow up i have read various other forums/pages/posts that say that the problem could be with lighting or occlusion...

 

attached is an image of what i have at the moment and the settings i am using in the material parameters...if anyone has any inklings at all what they think the problem is a push in the right direction would be greatly appreciated!!

 

Chris.[ATTACH=CONFIG]38468[/ATTACH][ATTACH=CONFIG]38469[/ATTACH]

Link to comment
Share on other sites

For what its worth, I think a lot of people are ditching the hair and fur for grass method because its just too troublesome for questionable results. Search around for proxy grass tutorials and I think you'll be end up with a workflow that is a little easier to adjust and looks great

Link to comment
Share on other sites

Cheers for the advice guys, I will look into using proxies. One thing that I have struggled with is that all tutorials seem to place grass on either nice flat planes (built in 3ds) or slightly undulating planes (again, built in 3ds). I build my models in Microstation V8i amd then import them as dxf's into 3ds. Will the proxy method still work in this case?

 

Thanks again,

 

Chris.

Link to comment
Share on other sites

  • 3 weeks later...

First of all I would bring the model in from MicroStation as a DWG. Because using DXF your more likely to have problems. DXF is an old format and MicroStations DWG converter is much better.

 

You won't have any problem with proxies once the grass blades are 3DS Max objects. Then proxy the grass blades. You can use a script to scatter the proxies. Have a look at Jeff Pattons tutorial on the http://www.mrmaterials.com

 

http://www.mrmaterials.com/jeffs-blog/101-mrproxy-grass.html

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...