Black holes in rendered images

[matramurena]

Hello,

I'm trying to render an image in a high quality. It will be used as en image of 4 by 2.4 meters so it has to look good. I tried rendering at 5000 pixels but when rendering Max leaves some of the "blocks" empty. It looks like black squares when the image is done.....

What could be the reason of this?

[Hedgehog]

Can we see an example?

[matramurena]

Here's an example of what I mean. I noticed that when I render the scene at 4000 pixels width instead of 5000 I don't have this squares. So, I'll just have to use that image instead.

[Hedgehog]

Possible memory problem... but 4000 is still big & could be upsized if really necessary... nice render btw :)

[hazardman]

those are probably final gather calculation errors and unfortunately i don't know of any solution as i've ran into this problem before...luckily for me it was in areas i could easily photoshop out...are you re-using the fg or recalculating it?..

have you tried a larger image then 5000?..also, as an experiment, you could render it straight to a file without using the frame buffer window to see if that will clear things up...

[craigp]

I would suggest also a memory problem. I rendered an image of 6144 x something with no problem but I do have 8GB of RAM

[hazardman]

I do have 8GB of RAM

hope you're using a 64-bit o/s to take advantage of it!..as 32-bit can only allocate a max. of 2 gigs for any one app...

anyway the above rendered scene hardly seems memory intensive to hold the geometry in ram for metal ray processing...that is why i sudgested to render directly to a file to see if it's a memory issue or a rendering artifact issue...

[craigp]

Yeah Running windows XP 64 bit - Which never seems to have any drivers for any older plotters lol.

[SLW210]

You could try increasing the size of your swap file. What are the specs on your computer and Graphics card?

[matramurena]

I rendered it on my laptop with windows XP on it. 2GB memory and a NVIDIA GeForce Go 7300 videocard.

Due to the deadline I had the final pic is now being usd to produce our wall for next weeks convention. I'll post a pic of the thing on the convention.

[Ian Ibbotson]

There may be a very simple solution - try rendering 'regions' of the image. Use the Render Type dropdown list to the far right of the main toolbar. Render one region, then move the region box and render another region. This should mean you use less memory