Crazy Homeless Guy Posted July 3, 2008 Share Posted July 3, 2008 Anyone have experience rendering Hair and Fur as grass using MR? I have a lot of field grass I need to render around a building, and am considering this method though the first few initial tests fell flat on their face. I was reading something on the LA user group site about specific MR hair shaders, but it sounded like it might currently be over my head. Link to comment Share on other sites More sharing options...
TheAllusionisst Posted July 3, 2008 Share Posted July 3, 2008 Haven't tried it since Max 9 so I am not sure if it will work with current versions, but you might try SuperGrass http://www.antiflash.net/supergrass/ And the all knowing mr guru Jeff Patton has an older tutorial http://jeffpatton.net/MR_Grass_displacement.htm Link to comment Share on other sites More sharing options...
Justin Hunt Posted July 3, 2008 Share Posted July 3, 2008 I tried max hair and fur, it worked to a degree but just couldn't get it convincing enough. I was trying to create long, coastal grass. From what I remeamber you have to add a mr shader and set the hair to render as mr primitives, or something like that. Took ages to render though Brian Bradley did a mentalboutmax video using hair in one of the project sceries (once again I'm going from memory) worked well jhv Link to comment Share on other sites More sharing options...
WAcky Posted July 3, 2008 Share Posted July 3, 2008 Mr fur for grass is annoying. Unless its for long grass like justin mentioned just comp in real grass. Like justin mentioned i would reccommend the Mental bout max tutorial in which they make grass using fur. They did a great job with it! Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 3, 2008 Author Share Posted July 3, 2008 Displacement is definitely not going to work. There is a couple of grass areas that range from 10" for one, and a foot and a half for the other. Right now I am working with a combination of proxies and comping in real grass in post to clean up the edges. If I can get something like the second image on the linked site below, it might look quite nice. But I don't want to extreme render times. I am fine with it taking longer, but if it more than doubles the time required for the high res image, I am going to use something else. Right now I am at about 1-1.5 hours for a 4000x4000 wide image. http://mentalraytips.blogspot.com/2007/10/hot-fuzz-hair-revisited.html . Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 3, 2008 Author Share Posted July 3, 2008 Another option I am considering is rendering the hair and fur in scanline, and then using that to comp onto the final image. Link to comment Share on other sites More sharing options...
peterguthrie Posted July 3, 2008 Share Posted July 3, 2008 I would stick with proxies ;-) The attached image was done using vrayproxies and the advanced painter script - I made 2 different 1m x 1m patches (which were made using standard max scatter and 3 grass blades) of grass and then painted them all over the terrain with random rotation and scale. Link to comment Share on other sites More sharing options...
Claudio Branch Posted July 3, 2008 Share Posted July 3, 2008 I would stick with proxies ;-) The attached image was done using vrayproxies and the advanced painter script. Agreed. I used this very approach recently and it worked great on my stills and animation. Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 3, 2008 Author Share Posted July 3, 2008 I would stick with proxies ;-) The attached image was done using vrayproxies and the advanced painter script - I made 2 different 1m x 1m patches (which were made using standard max scatter and 3 grass blades) of grass and then painted them all over the terrain with random rotation and scale. can i ask how you generated the grass model for the proxy? ...right now i am using modified plant leaves, generated with Onyx Flower. Link to comment Share on other sites More sharing options...
peterguthrie Posted July 3, 2008 Share Posted July 3, 2008 I just drew a triangle to the size I wanted it in the left viewport, then added a edit mesh modifier so that it had faces and then a bend modifier. I then collapsed each one to an editable mesh and gave each one a different material ID. I made 4 like this all a bit different and then scattered them around a plane as per the attached image. Its best to keep the grass as low poly as possible and with no thickness so that you can use a vray2sided material (not sure what the MR equivalent is) to simulate translucency. If you want the grass to look like it is being blown by the wind you could limit the rotation to say +- 10 degrees and again when you paint them on using advanced painter. Hope that helps, Peter Link to comment Share on other sites More sharing options...
Tommy L Posted July 3, 2008 Share Posted July 3, 2008 I made a field of prairie grass using vray fur. I know you want MR but if you have both then theres no reason you cant comp in post. Ive attached a small sample. This was a HUGE field of grass, between viewer and building. Rendered in no time. Worked great in conjunction with DOF. Link to comment Share on other sites More sharing options...
Claudio Branch Posted July 3, 2008 Share Posted July 3, 2008 Rendered in no time. W/ or w/o Shadows? Link to comment Share on other sites More sharing options...
Tommy L Posted July 3, 2008 Share Posted July 3, 2008 cant remember. Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 3, 2008 Author Share Posted July 3, 2008 I think I am going to try and use the Hair and Fur. I am going to set up a section, then convert it to geometry, and then make it a proxy. Below is a test of where I am at. I will wind up painting a slight orange/red tail on areas in PhotoShop afterwards, but is is slowly getting there. This image is 900 pixels wide, and rendered in 5 minutes. Which isn't bad, but I don't have the rest of the building in the scene. Link to comment Share on other sites More sharing options...
Justin Hunt Posted July 3, 2008 Share Posted July 3, 2008 I think that if you break the ground plane into smaller planes it will render/ be more memory efficient than one really large plane The grass tooks great jhv Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 Nice Travis - I had a play last night and got varied results - mind sharing your settings? Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 4, 2008 Author Share Posted July 4, 2008 sure. i haven't spent a great deal of time fine tuning things, so if you make improvements, please share those also... Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 (edited) Just had a play and got some real nice results, and pretty quick! This took about 90secs to render each frame (vlow settings mind you)... the crap at the bottom is just a displacement map. Edited July 4, 2008 by Ky Lane Link to comment Share on other sites More sharing options...
Crazy Homeless Guy Posted July 4, 2008 Author Share Posted July 4, 2008 that is sweet looking. Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 Later that day... Link to comment Share on other sites More sharing options...
ravi_chawda1981 Posted July 4, 2008 Share Posted July 4, 2008 wow it look awesome! I'll try this. thnx ky lane! Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 No worries mate... Ok, so Im a little slow at work, and enjoying learning MR Link to comment Share on other sites More sharing options...
MrCAD Posted July 4, 2008 Share Posted July 4, 2008 wow..thats alot of grass...nice work kylane Meher http://www.mr-cad.com Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 Took all of 5 mins to render too... very impressed... Hmm... the uploaded image is very blurry... wonder why. Link to comment Share on other sites More sharing options...
Ky Lane Posted July 4, 2008 Share Posted July 4, 2008 Try again... Link to comment Share on other sites More sharing options...
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