vray displacement problem :(

[Eric Sosa]

my costumer wants it's visu to be printed in an A3 size. at 200 DPI, I need to render for a 3307x2339 render size.

 

the house has grass with displacement around and I can max render 1200x800 without 3dmax crashing, anything above that size makes 3dmax to crash.

 

I have tried in a Quad with 3gb ram connected with spawner (distributed rendering) together with other 4 pc with the same quad & ram....and still crashes when rendering over that 1200x800 render size...hell

 

I have deleted all grass which is not visible but ti does not seems to help. my last solution is to make small "region" renders to cover the hole 33007x2339 render. it takes me years and still crashes often!!

 

any tip guys ?

[Crazy Homeless Guy]

off hand i can think of 2 options.

 

the first costs money, buy a 64bit windows machine and 8 gigs of ram. it will crunch that image in an hour.

 

the second, research vrimg format. there is info on this forum about it, and info on chaos groups forum about it. no garuntee it will work, but it will get you a lot closer.

 

...also, precalc your GI maps at a lower resolution.

[gfa2]

the second, research vrimg format. there is info on this forum about it, and info on chaos groups forum about it. no garuntee it will work, but it will get you a lot closer.

 

This really should do it. Also if you have non Vray materials in your scene, sometimes they will render fine at low res, but as soon as you bump it up higher they can start to cause problems.

[Spooner04]

If it's still images why not just photoshop in some grass?

[ARTECmedia]

If it's still images why not just photoshop in some grass?

 

This is 100% the right decision.

Still images don't need 3D grass.

 

Now on the question: Please verify the Vray release version. This was a bug in the program till release 1.5RC4. I'm 99% sure that you are not using the final release 1.5 final or 1.5 SP1. There is not such a problem.

 

Despite of this, you may chack the geomerty of your grass. Overlapping faces cause crash in higher resolutions.

[Eric Sosa]

This is 100% the right decision.

Still images don't need 3D grass.

 

Now on the question: Please verify the Vray release version. This was a bug in the program till release 1.5RC4. I'm 99% sure that you are not using the final release 1.5 final or 1.5 SP1. There is not such a problem.

 

Despite of this, you may chack the geomerty of your grass. Overlapping faces cause crash in higher resolutions.

 

very sorry but I don't agree about the photoshop grass...this 3D grass seems very nice to me; it can be seen on almost any kind of shape, terrain, surface, etc and it is great for LONG areas.

 

[ATTACH]23831[/ATTACH]

 

[ATTACH]23832[/ATTACH]

 

sorry about the bushes...this is only a test

 

got the rigth and final vray 1.5 version BUT you nailed ARTEC, my array was not done properly and faces were overlapping each other...THX for the tip

 

I have not tried...yet, but a combo of vrimg and not overlapping faces it will solve my problem...I suppose.

 

I may still go for crazy's suggestion afterwards..tho only for my own pc, not for the comapany's pc's where I work as designer.

 

thx all and MERRY CHRITMASS..btw

[classix]

When rendering high resolution images I often use backburner with splitted scanlines. Even with one machine only and vray this helps in most cases.

 

Marcus

http://www.einherzfuerpixel.de

[Eric Sosa]

it sounds clever..how du you that?

[classix]

Sorry for answering so late.

Establish a backburner rendering network.

Start manager and server.

Render a network rendering job.

Select split scanlines.

Select as many strips as you like.

Submit the rendering job.

Max will render each strip seperately and combine the strips automatically.

[Eric Sosa]

danke

I shall try that...cheers Eric

[Sawyer]

Something I have done is to tun off displacement for the calc phase of the gi and turn it on for rendering.

[Spooner04]

Did you get it all sorted out? What was your final resolution and render times?

[ARTECmedia]

@ Aeric Sosa

 

second option of the grass image is really interesting. I like it very much !

[Eric Sosa]

sorry guys...I have not made the test yet with the A3 size render (very busy making shops at work & no time to try the grass displacement at home)

 

promise to update you witn my results as soon as I have them.

 

I'm not a genious, but here u gor a little tutorial of how to make shuch grass:

 

make a 1200 x 1200 mm plane, assigning a grass mat/colour (bitmap) of your choise, then aply a "vray displacementmod" modifier with a tex map linked to a vray displacement map (white bitmap with black dots with different sizes spreaded) using a hight of 100mm or whatever feets your escene, with 2.0 pixels edge and 512 subd will make a nice 3D grass...just like this one...

 

[ATTACH]24039[/ATTACH]

 

want a bigger area covered?, simply make instances..and good luck with your render..hope it won't collaps, like mine did.

 

I added a sphere in the pic with vray fyr which looks very nice...but it's very slow to render, tho great for "close up" shots.

 

cheers....Eric

 

@Artecmedia...you must be a photoshop master !..have seen your site and the grass looks nice. can't realy see the renders at big size tho. changing to 3d grass instead?

[Spooner04]

If you are dead set on using 3d grass you might want to look at using vray fur to replicate grass. It might save you some time in the workflow and also give you some more control over blade width and color. I've played with it before, the render times jump up to an insanely high number for the first 20 min. or so and then drops down ofter a bit.

 

I would think that really the way to go for 3d grass in vray 1.5 final would be to create some sort of grass like geometry, turn it into a vrmesh and then proxy it into your scene and scatter it. I haven't tried this method yet, but I will soon. I would think this method would be easier to get a render off. and probably the same result if not a tad better.

[alfienoakes]

From the looks of the scene, it seems that there may be something else going on.

 

An A3 at that res is quite a big image to do, but there should be an easier way to render it out. It would be good to see what settings you are using, Ir and LC / QMC etc..

 

If you are using the 1200mm squares of grass, with high displacement settings, then just proxy that panel out, and render it that way. I had a similar problem with an image with loads of foliage in the scene. In the end it killed my file.

 

So I proxied out all the foliage, and voila.. 18 mins to render on a dual Xeon..( I know.. thats old)..

 

I just think that would be an easier way.. But it would still be useful to see your render settings as well..

 

Just seen spooner04 is pushing along the same lines... I can gaurantee it will be easier...;-)

[Eric Sosa]

we learn something new everysingle day , yep, you guys, alfienoakes & spooner, were rigth .

 

although, I had to change the "grass" (weed) of my first attempted escene to a completelly different type of grass: "marehalm" (danish particular type of grass), the combination of; vrimg format & proxis (what a fantastic tool ) have made my old pentium 4 with 4gb ram running with windows 32 CRUNCH the A3 size render in only....2 hours!!

 

here are a couple of examples of the grass proxies. (renders are under "work in progress" at this very site)

 

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I still got a question..proxis have made my escene very small (file size) and that's why I can make such render size in short time...am I rigth here?.

 

I can see that a proxi file was created somewhere else, it has a great file size and it's linked to the escene where the proxi object is located. can I delete that file withouth affecting my escene object?..haven't tried yet.

 

how can I edit my proxi?..in my escene object?

 

sorry if this thread is tunring into a proxi subject...I'm just happy I found this fantastic tool and I would like to know more about it.

 

regards....Eric

[Dave Oliver]

you might want to look at using vray fur to replicate grass.

 

 

i have been wondering with this, is there a way you can export vray fur and use it as a proxy? or somehow convert it to a mesh and then proxy it?

 

when i have a lot of vray fur in my scene it will start taking up to an hour to load it all before it starts to render

[Eric Sosa]

nope...(tho, I'm not an expert) I did try that. there is chance to select the mesh/plane/spline together with the vray fyr, but ubfortunatelly NO chace to make it all a new mesh and then export as proxi.

 

I did try to make the same kind of grass with the vray fyr...and took years to make only a small single test.

[Eric Sosa]

last question....can I make a proxi out of a vray displacementmod applied on a mesh/plane?, I did try, but I couldn't

 

I was thinking about visualizing a golf hole, from tee to green, using vraydisplacement, but withouth proxis, it seems hopeless.

 

Eric

[Spooner04]

Dave- I'm not exactly sure how the vray fur works, I would look on the vray forums to find out for certain. I think it works in the same way that a displacement modifier would. double check that though, as I could be wrong. I would think that you could proxy an object with a displacement modifier on it, but since vray has a hard time calculating displacement I think it might not be beneficial. I think this might be why eric had trouble with it as well. Again, I'm not completely sure

 

Eric- on your attempt to do the thing with the golf hole I imagine you would need to use vray proxy. I suggested you use fur because you seemed dead set to use some type of displacement grass. I would use proxy over vray fur.

 

I don't think you can delete the vray mesh because vray referneces that mesh when it renders the proxy.

 

I know that all of the blades of grass along with the tress in this image were done with proxy. The creator claims to have 2.3 trillion polys in the scene, I would think proxy would work just fine for your golf course.

 

http://www.evermotion.org:8080/exclusiv/vray_proxytut/17.jpg

[FlyinHawaiian]

last question....can I make a proxi out of a vray displacementmod applied on a mesh/plane?, I did try, but I couldn't

 

Eric

 

I wish... However, you can add vray displace to your proxies through the use of the displace map slot in the material you have applied to your proxy. A little less control than the VrayDisplacementMod modifier, but with a little tweaking, you can generally coax something useable out of it. (Also, be sure that in the Vray render Dialogue, under Vray: Default Displacement, that the "Override Max's"button is checked)

 

From the other proxy questions that you posted, it sounds like your best bet would be to take a look at the vray faq section on Vray proxies. In a nutshell though, they're like Xref objects. The only thing you can really do to them in your scene is swap out the materials, and add some basic modifiers (but unfortunately, not the VRDisplacement mod, last I checked).

 

In regards to the golf hole, it's been done. Back at Focus (my old job) a buddy of mine did an entire golf course animation. You can see it at: http://www.focus360.com under: Animation/Commercial - Other Nine Bridges. Granted, we had a render farm, but if you created different layers, and tightly managed your scene, it'd definitely be possible.

 

Aloha,

Joel

[Spooner04]

Joel,

I liked that golf course animation. Any insight into how the terrain modelling was approached?......i guess it's my turn to change the topic.

[FlyinHawaiian]

You're gonna hate me. Keith Morrison over at Focus wrote a scripted tool similar to "terrain" in max except in this case, it takes the topo lines/mesh, etc and makes nice square polys. Voila, perfect displacement, without long polys... I miss that tool....

 

Oh, yeah, and I forgot, I actually did some golf stuff too: http://www.joelburbage.com/images/JohnLaingHomes-Summerly_At_Lake_Elsinore_Summerly_At_Lake_Elsinore02.jpg

(It's a screen-grab from an animation... You can see the low res animation here: http://www.summerlylakeelsinore.com/Summerly/MasterPlan.aspx

(just click on the “take the tour” button next to the beach-ball).)

 

(Also need to disclaimer the movie: All done over at Focus- I art directed and did a large amount of the work, and managed a few other artists for the rest of the stuff)

Joel

[Spooner04]

You're gonna hate me. Keith Morrison over at Focus wrote a scripted tool similar to "terrain" in max except in this case, it takes the topo lines/mesh, etc and makes nice square polys. Voila, perfect displacement, without long polys... I miss that tool....

 

 

 

 

*sigh* I need to learn how to write scripts. I'll get to it after I master modelling, vray, compositing, etc.