New Vray user. Render pass comes out black

[jfmonod]

Hi,

Being new to Vray, I am having a problem with my first trial renders. I am following the Studio Lighting tutorial, so my render settings come from an authoratative source, and yet, while the light cache preview and irradiance passes seem to come out fine in the render window, as soon as the final render pass begins everything starts coming out black.

I am using Max 9, Vray 1.5 SP3. I have Vray lights in the scene, Vray camera and mapped Vraymtl assigned to a multi-sub object.

Any suggestions would be more than welcome.

 

JF

[Joseph Petrino]

Play with the exposure time on the vray camera.

 

btw I would use Max cameras 1st when starting with vray.

 

hope that helps

[jfmonod]

..... ok. I'm going to go curl up now.

I usually use Mental Ray with the photo exposure settings in the render dialog. Now I'm going back to Max 9, logarithmic exposure and attempting Vray. Someone could have mentioned the exposure on the cameras somewhere in the tutorial : )

 

Many thanks. I knew it had to be something I just wasn't seeing. I think you're right. I'm going back to the vanilla cameras and leaving the Vray ones to the big boys until I get something resembling a clue.

 

JF

[jfmonod]

Yeah, and I'm mortified. Thanks for teh wisdom.

 

JF

[jfmonod]

so was I. Hence the *happy face*. Forum posting is great but the assumed *tone* of the post definitely suffers. Take the last post lightly, I was just being a smartass.

 

I would definitely be a lot dumber if it weren't for people like you who actually take the time to respond. Many thanks.

 

JF

[rlominski]

Thanks so much, I was pull out my hair, then saw your post and unchecked "Exposure" in the Vray camera, and voila' it rendered.

Rob

[Brian Smith]

i highly suggest not using the vray camera until you are at least an intermediate level user. the best benefit (imho) of the vray camera, is the great depth of field and motion blur that comes with it. if you try hard enough, you can duplicate the look of the vray camera with a standard camera. if you dont know photography well, then you are doing nothing more than adding a bunch of extra variables to deal with. it's just not a good idea as a new vray user.

[rlominski]

Thanks Brian,

I thought that there was some other tie in with the renderer that kind of required you to use it. I had read about automatic exposure control and thought that you had to use the Vray camera for it to work. Thanks

Rob

[Brian Smith]

im not sure i understand you correctly, but if you're using exposure control through the environment and effects dialog box...dont. exposure control in vray is done through color mapping. stick with exponential or hsv exponential with default multipliers to start with.

 

also, if you use the vray camera (which you shouldnt right now), then you should leave color mapping set to linear with default settings because the vray camera has is own natural color mapping (exp. control).