light cache crashes ?

V-Ray V-Ray for 3ds Max Issues
1

Hello,

I have recently started using vray1.5 max9, and a have a problem when tying to do the final render.
I get all sort of crashes, max just disappears, or it gives me an out of memory message, this happens on different machines all 2 gig of Ram,
it only happens when I try to do the final render at high res, 4000/3000pixels.
when it crashes it seams that its only using 1.2 gig out of the 2gig of ram

files are quite big 100-150 meg, however I never had this problem with
vray 1.47 and always ended up rendering these kind of file sizes , no problem.

it seams to happen at the end of the light cache calculation, this in when it freezes, so I never get the buckets going, I tried switching of DR, that didn’t seem to help.

I had to go back to max7 and vray 1.47 :shock:

Anyone else had this problem ?

2

Which V-Ray 1.5 is this exactly ?

Best regards,
nikki Candelero

3

LC is always crashing at high render sizes (atleast with me).. I now only use it for test renders and switch over to QMC for large renders

4

Thanks for the response guys,

vray 1.5 RC3

I tried to switch to qmc, qmc, worked for a while , still got random crashes, tried different files, tried different machines,

I just seams that rendering got very unreliable, I don’t know if its vray 1.5, max 9 or me :shock:

any other suggestions :?:

Thanks

5

well, theres a few things you can do..

goto system (vray render settings) change “static” to “Dynamic”, your render will be slower, but it will use alot less ram.

Or…render using vrays render “vray raw image” with “render to memory frame buffer” turned OFF and turn on “generate preview”. This will also save alot of ram.

good luck!

6

Thank you mdi,

I tried various ways of easing the load on ram including what you suggested, didn’t seam to work, when it crashes it seams to have plenty of ram left.

I tried something that seams to work,
I saved a high quality light cache file (3000) at low res ( 1500 pix) and then used it in the high res render , if this continues to work it looks there is a problem saving the light map file

cheers

7

is this an old scene brought over? i have had crashes with them

but new scenes started with 9 work a treat.

8

werticus,

they are new max9 scenes

9

could be posible you have some bad geometry in your scene somwhere.?

10

mdi, first thing I thought about, its not that, tried different scenes,
Everything collapsed,

i just had another crash, both light cache and ir map prerendered :x

max just disappears of the screen , windows doesn’t crash
maybe its a max problem,
just surprised other people don’t have the problem.
i have to say that the problem appears when i do the 4000 pix rendering,
the thing is i always rendered at 4000 , no problem
last year did some at 8000 pixels , no problem with vray 1.47 and max7

it just looks like to be unstable in any type of rendering, qmc-lc, qmc-qmc,ir-lc,

11

it could be bad memory…when max next crashes a pop up should apear asking if you want to email autodesk info about the crash, on this pop up is an option to look at the info that would be sent to autodesk, you might get a clue about why its happening

12

now it crashes without any autodesk window, I have seen that a couple of times

13

i don’t think its bad memory , because I don’t get the crashes in max7-vray1.5

14

I mean max7 vray1.47

15

did you have the same LC problems in vray 1.47 ?

16

if max is just disappearing usually its running out of memory.

17

so, same scene renders ok in max7/vray1.4, but runs out of ram in max9/1.5.

is it possible that autodesk has “improved” memory managment for max9?

18

I may be something to do with vray as well? I doubt max has anything to do with it.

In the scenes that you have that crash. Are you using any displacement?
I find 3d displacement if not setup correctly especially when paired with LC, it will use alot of memory, where as switching back to 2d the render will proceed normally.

19

well, i had similar problems when renderering high res images with vray in max7. max just disapeared or the rendering just stoped. if you allready calculated the irr and lc, then render your final images in regions and put them together in ps. that was the only workaround we found to render out images in A3…

20

i had no displacement,

i know it looks like a ram problem, what intrigues me is that when it crashes it using only 1.2 out of 2 gig
and i had the same problem on 3 different machines so its unlikely to be bad ram.