large format renderings

[nodar1978]

hello guys, I'm trying to render large exterior image in max vray. but program is closing itself. ram is 4 gb but ......

I want to render A3 format, but i can't render even A4, they asked me 300dpi, but i don't think they know what they need, it should be not poster, but little bit big images I think about A4 is enough. how big can i print A4 render, if i'll print it on A3 will be OK or no?

I'm trying to make lower settings in Vray but quality going down very much.

can you help me guys?

and one more: the DPI volue I have to give when I'm saving the images as a tif is not it?

thanks

[Antisthenes]

np here. when using Vray but i am not on Max

[Trevor Tizard]

I would ignore the dpi and render your image at say 4000 wide and see if the quality is good enough. You may have to render to vrimg or exr and disable the vray frame buffer, but yes, a request for 300dpi sounds like duff info to me.

[3dimagen]

find the plugins SUPER RENDER

[Nic H]

use the print size wizard in rendering menu to work out size.

a3 @ 300dpi is 4960x3507....thats pretty big.

 

i dont reckon they really need that size! do it smaller and upscale it if they ask for bigger (just dont tell them)

 

your scene must be pretty massive to crash with 4gb. displacement? try turning that off first.

[nodar1978]

here are the scenes, I think you have seen them in my old threads. they already are printed in brouchure, but for that time i gave them small resolusion, but now they asked me for big printeings.

I use vray cam, vray sun, in exterior trees are proxys, but in interior i have a crash as well.

have a look please

thanks

 

 

 

 

use the print size wizard in rendering menu to work out size.

a3 @ 300dpi is 4960x3507....thats pretty big.

 

i dont reckon they really need that size! do it smaller and upscale it if they ask for bigger (just dont tell them)

 

your scene must be pretty massive to crash with 4gb. displacement? try turning that off first.

[nodar1978]

if I'll change resolution from 72 to 300 in photoshop could be OK? how do you think guys?

[Nic H]

those images should not be crashing. it looks pretty simple.

how many pixels are your images and what kind of prints are they going to be?

[nodar1978]

as they asked me they need it for A3 printing, to hang on a wall on day of presentation, so peaple will stand not so near, there will be some distans between images and person

 

those images should not be crashing. it looks pretty simple.

how many pixels are your images and what kind of prints are they going to be?

[Antisthenes]

they will not look OK but they will be ok and work

it all depends on the interpolation method

[AJLynn]

300 PPI would only be needed if the person is going to hold the printout (and it has to be a really good printout, mind you, from one of those 12-ink printers) 2 inches from their face to see every detail.

 

For something on the wall, 150 is plenty and 200 is overkill.

[markf]

Andrew is correct.

 

Also, quite important to a correct understanding is that he uses PPI (Pixels per Inch) vs DPI.

 

This causes so much confusion and it seems that it will never go away. Printers like my Epson Stylus Photo have a number of choices to set the DPI at up to 5760 dpi.

 

A standard request you here from people in the print business is that they need the image at 300 dpi. This doesn't really mean much. What they really mean is that they need, or think that they need, 300 ppi (pixels per inch). That is a standard for printed magazine cover or advertsisement. For a large poster on a wall 150 ppi inch is plenty.

 

Don't waste your time trying to explain this. I usually just say, "I'm using Photoshop and I can't find anything there that has dpi. In the image size dialog there is only ppi."

 

If you change the resolution in Photoshop from 72 ppi to 300 ppi what happens depends on whether you have the resample image box selected or not. If it is not selected (no resample) then your pixel dimensions remains the same. If you have resample image selected the software interpolates and adds pixels to increase the pixel dimension. This adding of interploated pixels should be avoided and makes images blurry.

 

For example, if you want to have A3 (16.5 inches wide) at 150 ppi, then render your image at 2475 pixels (16.5 inches x 150 ppi) wide by the corresponding height ratio.

 

Hope this helps

[johnvid]

As discussed already, you should not have any trouble rendering 'that' image, at any size you wish, and should be happy that they want a large version of it, VRAY should easiliy cope with what you can see there, especially if the wharehouse is not full of geometry,

 

I think if you where to colour correct the images they would look a little better they seam to have a colour cast.

 

4000 px wide or even 5000+ would be fine for most large format uses, what is the scene file size, don't forget the render to vrimg option, ......I have had the same problem, on a scene but the project was full of detail, project size 350MB and climbing, but I think there must be many people here that have projects bigger than that, and still don't come up with rendering problems..

 

Sometimes I have scenes where the IR map doesn't like a particular view, and it crashes, where previously the same scene didn't, ive then stripped out 100 of geometry simplified the scenes reflections & material settings and it still crashes, so it can be a pain.

[nodar1978]

guys thank you very much for your help. you gave me very good information.

I'll give you soon the stetting option for vray and give me advice what to do with this, i think crash problem is in settings, when i go down quality is bad. so I'll put here soon the settings and give me advice please

[nodar1978]

hi guys here is a settings for a scene of interior of warehouse.

project is 68 mg. i use vray camera ans sun, and not so spesioal materials.

and one more question: should i make size in Vray parameters=>frame buffer=> output resolution, or can i do it in commont parameters? i usually do it in commeon parameters not in vray, is there any difference?

have a look please

thanks

[Nic H]

woah - do you have massive render times?

50 min subdivs! (id go 8 for starters)

3 global multiplier! (keep at 1 to start as well)

 

do you have displacement?

[nodar1978]

no displacements. and could you tell me what the different btween Vray frame buffer settings for output resolution and common settings outpus size? can they bi a different?

thanks

 

 

woah - do you have massive render times?

50 min subdivs! (id go 8 for starters)

3 global multiplier! (keep at 1 to start as well)

 

do you have displacement?

[Derek Forreal]

as far as i know, there's no difference between max's output size and vray's. when i use the vray frame buffer, i always uncheck the 'Get resolution from MAX' option and specify directly on the vray page. it just saves me having to go to the 'common' tab.

 

also, you have 'default lights' on. this affects your scene lighting and is generally best avoided.

 

edit: forgot to add that if you use the VFB, it's best to specify a very small size in the common settings as i think there's still a problem where max uses up memory even though you only see the VFB

Edited June 28, 2008 by derekforreal
additional info

[johnvid]

I would also change:

 

Max transparent levels 12 should be enough

turn off catmul rom especially when doing the light calcs, turn it back on if you think you need it, after you change all other settings, you could do it in post.

 

dont think your noise thresh is correct, perhaps 0.005 0.003, but i never use the light cache,it always takes forever... so I dont know if its ok,

 

you have glossies on try it without and see if you like the result, I like well done glossy fx but dont see too much in your image, also, I would make sure the materials such as the grass, hedges, and leaves(all seem too light green, interior looks better) on the trees dont have reflections in the material... or it will take forever...and the result can be just as good without it...it may not be physically correct but, it might be easier for you to get a good result and much quicker. so turn off use light cahce for glossies and see if you like it.

 

if you render to float(turn off clamp output), then maybe you will have more chance to fix in post,

 

if you increase your render region from 16x16 to 48x48 is it any better, I think if its trying to devide 16 I think it doesnt help. increase your 400mb memory limit to 800 or more as you have enough ram but it might also help it not crash...

 

but what about the colour cast....

[BrianKitts]

everyone's comments are spot on about the resolution. Even if you are going up to a billboard size image those are only printed at approx 50 dpi, so if someone tells you the need the image at 300 dpi for a large print most of the time they don't know what they are talking about and just resorting to a standard, any time you send something for a magazine publication 300dpi is always going to be what they ask for, large format printing is a different monster.

 

As for rendering big if you don't have a 64bit system with a boatload of ram rendering to a VRIMG file is the only way to go. A couple weeks back I completed a rendering @ 7000 pixels wide that is going to be printed 40 feet wide on a billboard.... couldn't take the resolution anywhere over 3000 pixels without crashing when rendering to the onscreen frame buffer. Normally anytime I have to go anything over 3k I automatically render to file just to be safe.

 

The last thing to keep in mind is when you render this big, to drop the min/max multipliers appropriately in your irrandiance map settings.... big renders = large irradiance maps, and as your overall size increases you can keep the same quality with lower sampling values for your irradiance map which of course equals less memory consumption leaving you more available memory for storing the rendered image data.

Edited June 29, 2008 by BrianKitts