Three D

hi. the attached image shows a house i modeled in autocad 2008 and rendered in 3ds max 9 using vray. i'm happy enough with the result as it is to be used in a photomontage showing the house's relationship with the existing site and the existing photo was taken on an overcast day. typical irish weather. however i would like to replace the grass shown with some meadow type grass similar to the grass on the following webpage

http://www.evp.vt.edu/images/meadow1.jpg

can anybody suggest a way of doing this. i've tried a vray displacement modifier and displacement map (seperately) but max crashes even though i'm working on a 2.9ghz quad core with 4gb ram. i've also tried the scatter command but max crashes with this also as the number of objects becomes enormous. i've set the dynamic memory limit in the vray system setting to 2600mb but max crashes at about 1500mb usage (according to task manager). also, the scene is lit with a HDRI image so i was wondering if this is contributing to the crash. i dunno. any help or suggestions would be very much appreciated.

Attached Images

web.jpg (268.9 KB, 359 views)

stef.thomas

VrayFur is probably your best bet. You could try downloading this to give you a start then play with the settings to get what you want.
http://www.vray-materials.de/all_materials.php?mat=476

chuck

I usually don't have crashing problems with displacement, I'd give it another try with the Windows 3gb switch...that will allow you to use up to 3gb before Vray crashes...theoretically.


You just need to add some code to the boot.ini file, not a big deal:

http://www.microsoft.com/whdc/system...AE/PAEmem.mspx

manta

Well here's what i came up with after about 5 minutes of playing with vrayfur...

Attached Images

tall-grass.jpg (68.8 KB, 283 views)

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Three D

Thanks for your help guys. I'll give the 3GB switch a go later but this is what I came up with - image attached. The vray fur worked in the end but I had to render the grass seperately to the rest of the model and then photoshop it.

Attached Images

view 3 composition.jpg (118.0 KB, 251 views)

Joseph Petrino

If you decide to go with displacement, use 2D displacement.

3D displacement crashes even our 64 bit machines, but 2D works fine.

Crimsus

I typically don't touch VRayGrass because it takes way too long in my opinion.

I prefer to use the built-in Hair-Fur modifier in 3ds. After I have determined I have a good patch of grass I convert it to a mesh. After that, I bring the grass patch into the scene as a Proxy and then generate a material using a gradient ramp, etc.

VRayProxy also works well but lacks the ability to store the material info, which is actually a plus in some cases since some scenes would require somewhat drier grass, some require greener grass, etc.

-Crimsus

ovzoc

I prefer doing grass in Photoshop or Gimp... Brushes and layers, maximum time 20 minutes and my grass is ready... Keep in mind that you should pick colours relative to the environment...

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bparker

This is an old post, but does anybody have tips on using vrayfur for long grass? I am trying, but the render time is out of this world!


Any Help would be appreciated.
www.whitebirchstudios.com

hhoa_kts

I agree with you, doing grass in PS or vray displace, I think vrayfur and hair&fur is good to make small area (carpet...)

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