RevitGary Posted November 23, 2009 Share Posted November 23, 2009 What is the best way to use onyx grass? It comes in square patches. I have made it a mental ray proxy and copied it into place. This gives it a striped pattern. So I randomly rotate some of the patches until the stripe pattern goes away. Is there a beter way to do this? How would I make the grass follow a curve, like a flat plane going down down to a ditch? thanks! Link to comment Share on other sites More sharing options...
WAcky Posted November 23, 2009 Share Posted November 23, 2009 Make 5 different patches and scatter tham about randomly? Link to comment Share on other sites More sharing options...
jinsley Posted November 23, 2009 Share Posted November 23, 2009 Onyx only exports square patches? If you can get a disc shape out of it, you could try this... http://www.peterguthrie.net/blog/2009/04/vray-grass-tutorial-part-2/ I have a feeling that with the square edges, it will be harder to blend them together even if you are scattering them with a random z axis rotation. I think that the square shape would only really help if you were using them along an edge like a sidewalk, etc... Link to comment Share on other sites More sharing options...
Trick Posted November 24, 2009 Share Posted November 24, 2009 In Onyx grass you should make a round patch and make the bladelength dependant on the patchradius (smaller on outside). Make 10 randomly generated patches of about 20/50cm depending on how you want to use them, convert them to proxies and spray them around ! Link to comment Share on other sites More sharing options...
RevitGary Posted November 24, 2009 Author Share Posted November 24, 2009 sounds good for a flat plane how about dipping down curved hill? Link to comment Share on other sites More sharing options...
Ernest Burden III Posted November 24, 2009 Share Posted November 24, 2009 I have Onyx, but not grass...or do I? I don't know. I don't use it much. When you import the grass does each blade read as a separate object? If so, perhaps a bunch of them could be used as blocks or proxies or whatever you call that in Max, and randomly dispersed on your ground mesh. There should be a function or plug to force them to hit the ground level. I agree that square 'tiles' of grass is not a good solution. Link to comment Share on other sites More sharing options...
jinsley Posted November 24, 2009 Share Posted November 24, 2009 sounds good for a flat plane how about dipping down curved hill? download the scatter utility from www.maxplugins.de and when you apply it to your plane, check the align to z object normal... should follow the shape of the ground... I used it here: http://www.cgarchitect.com/vb/38623-personal-practice.html#post268831 and here: http://www.cgarchitect.com/vb/37505-grass-test-using-particle-flow-mr.html I like it. Link to comment Share on other sites More sharing options...
RevitGary Posted November 24, 2009 Author Share Posted November 24, 2009 I see a vray scatter. Will that work with mental ray? Link to comment Share on other sites More sharing options...
jinsley Posted November 24, 2009 Share Posted November 24, 2009 vray scatter you have to purchase i think... search the database for "scatter" the proper one is written by Peter Watje. Download and run it as a utility... Link to comment Share on other sites More sharing options...
francosd Posted November 24, 2009 Share Posted November 24, 2009 Here you can find nice script fo random sacatter http://www.evvisual.com/maxscript.htm Link to comment Share on other sites More sharing options...
RevitGary Posted December 30, 2009 Author Share Posted December 30, 2009 I have the script. It is loaded I can see and use it with a test box. But when I convert the test box to a mental ray proxy the scatter option is grayed out. Anyone have any idea if this scatter plug-in can work with mental ray proxies? Link to comment Share on other sites More sharing options...
Ricardo Eloy Posted December 30, 2009 Share Posted December 30, 2009 Since proxies are not exactly geometries, any scatter function is likely not to work with them as base meshes. You could do the scattering before converting it into a proxy, convert the scattered objects into meshes (so they no longer depend on the scatter base geometry) and then convert the base into a proxy. Link to comment Share on other sites More sharing options...
pidge Posted January 10, 2010 Share Posted January 10, 2010 grass o matic is the easier way to do grass, I have onyx, but never use it for grass Link to comment Share on other sites More sharing options...
jinsley Posted January 11, 2010 Share Posted January 11, 2010 Peter Watje's utility should work fine... I have been using it for many months now... Some threads on how I have been doing it... one talking about particle flow as an option. http://forums.cgarchitect.com/38623-personal-practice.html http://forums.cgarchitect.com/37505-grass-test-using-particle-flow-mr.html Works great with mental ray proxies. Attached are the zip files for the utility for 2009 and 2010... Link to comment Share on other sites More sharing options...
notjeff Posted March 24, 2010 Share Posted March 24, 2010 (edited) Has anyone had any luck animating some of the taller Onyx grasses blowing in the wind? Seems there are no presets w/it for that in the software unless i am missing something so the only way to go about doing it in max is by manually doing it the good old fashioned way. Yikes. Edited March 24, 2010 by notjeff forgot to mention onyx Link to comment Share on other sites More sharing options...
montecarlomethod Posted March 25, 2010 Share Posted March 25, 2010 did anyone mention autograss? it's basically like vrayscatter but only does grass. pretty good. google it. Link to comment Share on other sites More sharing options...
Scott Dombrowski Posted March 25, 2010 Share Posted March 25, 2010 Yes, Autograss does look like a great solution, but it is Vray only. Send an email to graham@happy-digital.com to request mental ray support! (I've already bugged him a couple of times). Link to comment Share on other sites More sharing options...
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