Scott Dombrowski Posted September 21, 2011 Share Posted September 21, 2011 i use iray and hardware is: i7 2600k @4.5ghz, 16gb ram, quadro 5000 I suspect that your bottleneck is iray. Your entire scene must fit in the RAM of your video card, which I think is only 2.5GB for the Quadro 5000. I know Jeff Patton has been using iray quite a bit, so you may get some suggestions from him. Check out his website, he has two posts regarding using iray for exteriors which may help you a bit. Be sure to read the comments on both posts, he goes into more detail there. Link to comment Share on other sites More sharing options...
erkutacar Posted September 21, 2011 Author Share Posted September 21, 2011 its not iran, coz if it exceeds the gnu ram, it switches to cpu and actual ram.. and it does the same in vray or mental ray.. Link to comment Share on other sites More sharing options...
erkutacar Posted September 21, 2011 Author Share Posted September 21, 2011 the one on mrmaterials doesn't even have that grass texture map.. its just gradients.. zip file only has the preview jpeg and .mat file.. don't u guys have a nice displacement map i can use? Link to comment Share on other sites More sharing options...
Scott Dombrowski Posted September 21, 2011 Share Posted September 21, 2011 yes i know, and i need one with a good displacement map.. ive downloaded one from jeff patton and it looks great in the preview but once u load the material there is no displacement map.. some gradient maps for the fall offs.. here is the preview image [ATTACH=CONFIG]44913[/ATTACH] That material is just for the texture of the grass blades. The actual geometry for the grass blades in that image was generated with the Grass-O-Matic plugin. Whenever I do a large area of grass, I make a few different sized patches (12 inches diameter, 36 inches diameter, 72 inches diameter), turn them into mrproxy objects, then paint them as instances using the Object Paint tool. I end up with a scene that has 10+ million polys, but since most of them are instanced proxies, it doesn't matter. I have 12GB RAM on Windows 7 64bit. Here's what one of my scenes with proxy grass looks like: [ATTACH=CONFIG]44915[/ATTACH][ATTACH=CONFIG]44916[/ATTACH] its not iran, coz if it exceeds the gnu ram, it switches to cpu and actual ram.. and it does the same in vray or mental ray.. If that's the case, then it sounds like your grass and tree geometry isn't instanced, or the proxies might not be set up correctly. That's about all the advice I can give without looking at the scene. Could you zip it up and post it somewhere? You mentioned your system specs, but you didn't mention whether you were running 32bit or 64bit. I'm assuming 64bit since you have so much ram, but a 32bit system would be one source for running out of memory. As far as using displacement for grass instead of geometry, I've never had much success with displacement grass, so I don't have any advice what the best way is. Ramy Hanna came up with a displacement shader for mental ray a while ago that works for him, so you might try that. Link to comment Share on other sites More sharing options...
erkutacar Posted September 21, 2011 Author Share Posted September 21, 2011 Hmm i assumed it was displacing the mesh, never thought of it to be for the blades.. U r right the problem might be my proxies.. Ill make the proxy again and see how it goes.. And yes 64bit win7ult and 64bit max.. Im not home atm.. Will be in couple hours.. I will let u know it turns out Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 ive made the proxies again but same result.. i managed to get a decent looking grass field with hair&fur by selective planting.. ive selected only the polygons which would be visible and also discarded the lover part of the land and covered it with soil material.. ill make it paintball area.. so ive saved about 50% of surface and managed to get 600,000 hair.. i still need about 8-900,000 for a more natural look.. the material i applied looks too light, ill change that in PS.. here is a render: (its 1920x1080 so u might wanna view in full size) [ATTACH=CONFIG]44928[/ATTACH] i just downloaded grass-o-matic but ill try that tom.. its 7am here and im dead tired thnx for all the help everyone.. Link to comment Share on other sites More sharing options...
Scott Schroeder Posted September 22, 2011 Share Posted September 22, 2011 [ATTACH=CONFIG]44929[/ATTACH] This is the grass patch I use. It's a 5'x5' patch of grass and it's only 1200 polys. Why is your grass so high in poly count? That's excessive. Each grass blade in my patch is only 3 polys each. Unless you are rendering ant level views, you don't ever see that much detail Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 i guess mine had thinner blades, therefore denser.. but u r right, i used i think 6 segments for each blade.. ill try to make a simpler patch now Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 damn that stupid counter was only counting the polys of the distribution object actual blades are 15000 no wonder im running out of mem Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 hey scott, this is a low poly version that has 500 blades and 3 segments for each.. the distribution object is 100cm by 100cm which is 2/3rds of ur object.. but still it doesnt look as dense as yours.. more polys smaller patch but less density it doesnt make sense how wide did u make the blades? and how tall? mine r 9cm by 1cm.. [ATTACH=CONFIG]44934[/ATTACH] Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 this is 1000 blades.. double the one before still not as dense as urs.. the ball is official size 5 soccer ball size.. [ATTACH=CONFIG]44935[/ATTACH] Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 oh at last i managed to get proper grass my low poly blades like u said scott.. in total less than 800,000 polys (unless a plane has 2 seperate polys for front and back.. it may be a trick that max does... mirroring the poly to form heightless plane, coz u cant remove a face of a plane) any ways.. the whole scene takes about 10gb and here is a draft render: [ATTACH=CONFIG]44936[/ATTACH] thank you all for the support and patience Link to comment Share on other sites More sharing options...
Scott Schroeder Posted September 22, 2011 Share Posted September 22, 2011 The thing you have to remember is that more than likely you'll see these patches at an angle so they can be pretty sparse, if you were to look top down on mine you would see some gaps. I create my patch by making 3 different blades, then using particle flow to scatter them around the 5x5 plane. You set the particle system to generate "x" number of blades, I used 400-600 depending on the needs, and you can also set the particle system the keep the particles (in this case the grass blades) apart to prevent clumping. Then you freeze the particle system and convert that mesh into a proxy. It helps when you are testing to always use a grass texture on your base plane too. Using white or gray makes the patch look much more sparse than it really is. Link to comment Share on other sites More sharing options...
erkutacar Posted September 22, 2011 Author Share Posted September 22, 2011 hmm interesting.. ill try that sometime.. i cant bother with it now that i managed to get some kinda working grass i used scatter compound object to create a patch.. so particle flow takes less memory? or just its easier? Link to comment Share on other sites More sharing options...
Scott Schroeder Posted September 25, 2011 Share Posted September 25, 2011 It's easier because you can set the particles to keep apart so they won't be placed within a radius of each other. This prevents clumping that any scatter tool tends to use and gives you a far more uniform spread of blades. Even area scatter tends to clump blades. All in all, it depends on if you are familiar with Pflow or if not if you have the time to learn it. It's not difficult, but it's not something to pick up in the flow of a project. Link to comment Share on other sites More sharing options...
erkutacar Posted September 25, 2011 Author Share Posted September 25, 2011 thnx a lot ill look into it.. Link to comment Share on other sites More sharing options...
Madredchris Posted September 29, 2011 Share Posted September 29, 2011 Ram isnt the problem. I used proxy, made 5 blades of hair, scattered those (about 1500000 grass-blades x 5 = alot) Set-up intel E8400, dual core 3ghz or so, and 4gb of ram Link to comment Share on other sites More sharing options...
NeWAcEiN Posted September 29, 2011 Share Posted September 29, 2011 yp maxer is right use mrProxy to create mesh proxys and scatter them using programs like carbon scatter i prefer displacement using normal maps it is good indeed with low mem requirements but if u need detailed look chk for VUE software it is awesome, used in Avatar as well cheers!!!!! Link to comment Share on other sites More sharing options...
erkutacar Posted September 29, 2011 Author Share Posted September 29, 2011 my mem isnt low its 16 gig.. but i used 8 blades scattered over 50cm x 50cm plane then converted to editable poly.. i made a mrproxy of that object and i scattered that about 28000 times.. (face centers of all polygones) over a 100m x 70m plane.. anyways ive sorted it out.. thanks for the replies.. Link to comment Share on other sites More sharing options...
nilesh1234 Posted October 1, 2011 Share Posted October 1, 2011 hello friend i have understand your problem u can use the autograss plugin for the large scale field or u can use multi scatter also for that and just reduce the light if u are using vray then use vray sun u will light all the scene Link to comment Share on other sites More sharing options...
erkutacar Posted October 1, 2011 Author Share Posted October 1, 2011 thankx a lot ill try the plugins.. i use iray and mrsun.. Link to comment Share on other sites More sharing options...
NeWAcEiN Posted October 4, 2011 Share Posted October 4, 2011 (edited) my mem isnt low its 16 gig.. but i used 8 blades scattered over 50cm x 50cm plane then converted to editable poly.. i made a mrproxy of that object and i scattered that about 28000 times.. (face centers of all polygones) over a 100m x 70m plane.. anyways ive sorted it out.. thanks for the replies.. dude 16 gig of mem is too much u can create a jungle !!!!!!! u ll need a technical assistance to max u r output Edited October 4, 2011 by NeWAcEiN Link to comment Share on other sites More sharing options...
erkutacar Posted October 5, 2011 Author Share Posted October 5, 2011 lol i agree Link to comment Share on other sites More sharing options...
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