rendering at Hi res question

[alex321]

HI

I tried this morning to render a 101 megs scene file. I have been successful at lower resolutions such at 1024 X 960and so on.
I ve been asked if I could render for 8.5 X 11 at 300 dpi this time. I went on then to render at about 4000 pixels in width and locking the ratio at 1.33.
However i noticed as Vray was building the Light Cache the frame buffer wasn t showing anything. It was all black and kept on building up the light cache. Once it was done the buckets started to work on the first pass but it was all black.
I then lowered the resolution to 2000 pixels wide and the light cache worked. i went higher at 2400 pixels, 2600 pixels and 2800 pixels and they all work. But as soon as I went above 2800 pixels resolution I still end up with a black frame buffer.

Do we know why it happens?

Thanks

Alexandre
www.alexandregalin.com

[dalomar_cg]

Re: rendering at Hi res question

I've noticed this before (and Micha reported it to), but it happens at different resolutions (larger ones...Micha reported it at 5000...I've reproduced it at 4000, but I've had machines be fine at 6000). Ultimately, I think the vfb is simply turning off its display in order to save on memory. There's only so much memory a single process can take up (on 32bit at least), and that memory is better used for the actual rendering as opposed to display. If you have a very large model with alot of textures and other memory enhancement things, then chances are you might run into that "memory ceiling" a little earlier.

I haven't had any indication that anything different is going on with the actual rendering, so I'd just suggest that you set the image up to be automatically saved (duh!)...Best practice is to render to VRImage. The only downfall to that is the conversion (which isn't that much of a downfall).

[orei]

Re: rendering at Hi res question

i've the same problem now.. with my model.. is a big model.. 96mb with textures.. if i render with light cache how secondary engine.. when it calculate light cache.. everithing stop.. render sims to doesn't work.. but not crashed.. how can fix??

if render with qmc how secondary (primary always irradiance map..) everithing is fine.. but for test render.. it's tooo sloooowww!!