black render

[fabrizio]

I have a problem.
I render a big image (3000x2250) and in the vray message i read "warning: invalid lightmap sample(s)"

Then the render is black.
the only two way to render is:
1- render per region (small regions)
2- render a smaller image.

Is it a bug?

[vlado]

Is the Bitmap pager turned on? If not, try turning it on and see if that helps.

Vest regards,
Vlado

[fabrizio]

hi vlado,
it doesn't work

[vlado]

Ok then. What's your memory usage while rendering? If you render without textures, do you still get the problem?

Best regards,
Vlado

[fabrizio]

I have only 2 texture and I haven't memory problem.

Now I discovered that even with small image I have the problem.

Maybe there are too lighcache samples.

[vlado]

Do you get any warnings in the V-Ray messages window?

Best regards,
Vlado

[fabrizio]

Yes,
"Material returned overbright or invalid color"

but if I render per regions no warning appear

[vlado]

Right; have you tried to turn on the Crop option for your bitmaps?

Best regards,
Vlado

[flipside]

What are your lightcache subdivs? I remember people having similar problems when LC subdivs= 1000

[fabrizio]

Did you mean in the material editor? Yes in the material editor the crop is on.

bye

[vlado]

Well, I can't think of any other reason for this to not render; a final test could be to try and render without any bitmaps and see if you still get the problem. If not and everything is fine without textures, then some of them are causing the problem.

Best regards,
Vlado

[fabrizio]

@Flipside
LC Subd. 2000 but I never had trouble with 1000

@Vlado I tried witout textures and I had the same problem


bye

[vlado]

@Flipside
LC Subd. 2000 but I never had trouble with 1000

@Vlado I tried witout textures and I had the same problem


bye

Ok, that's a good sign, but I will be able to tell you more if you can send me the file to look at; otherwise I don't know what may be wrong.

Best regards,
Vlado

[Candelero]

Have You tried with an Override Material (VrayMtl) in the Global Switches...
Material By Default (just a diffuse color).

[fabrizio]

At which email can I send the file?