VRayLightMtl + VRayDirt for Quick AO Render Checkup

Hi,
I am getting the objects rendered black and only few objects in the scene are getting the effect.......... please help
I have unchecked exposure in camera, used vray lightmtl with vraydirt.

Hey guys,

I had the same problem with it rendering a white photo. This is something I discovered while playing with the settings:

I have found that (at least in my case) unticking the "ignore for GI" option in the VrayDirt Parameters seems to make it work. It renders just fine with this option unchecked.

Hope I helped you.

Hi,

I am working on an interior scene in decimal feets. Using a vray camera and light setup for the same. But whenever I render, i just get a white image with only a few lines of black on the central AC put just next to the camera.

using the same settings. exposure to off... no GI... I tried with lights on and off, default lights on and off, no change.

Please help!!!

thanks for the tip. I've been using this technique for mental ray, although the exposure is turned off in the environment slot. i forgot that vray's camera has its own exposure, and this is where you need to turn off so your image will not turn black.

Hey Ronen,

Gongrats on the great blog! My comment has nothing to do with this post (Even though its gratifying that I have been using the same technique). Just wanted to comment on the carpet, it looks great.. How did you make it and how do you get such an object to not flicker when animating? Especially in the AO pass?

Hallo, I read this powerfull mini tutorial and i find it very helpfull but can anyone help with the position we put this VRayLightMtl? In the environment of max may be?

I think there's a small problem with this tut. Where it says use pure white and pure black... it's never a good idea to use pure white or black for any material or VRrayDirt, it's not physically possible and would result in strange GI calculation, for example if you use a pure white and there are lots of lights and GI you might end up with a totally burnt image (because light bounces 100% off pure white which is not possible for any physically correct material) and if you use pure black it will absorb all light falling on it, etc...

@ sansamuel: is your light setup set for a physical camera? if so, did you try to render your AO pass through your physical camera?

I get a fully white frame too, any explaination for more detail...? I really need this.

I cannot seem to get this to work, when i render I get a fully white frame, can you please provide more details?

good result very quickly!!

thanks

great tip, I was looking for some way to do AO in vray for quite some time now, this is great, thanks for the tip!

I'm using render elements VRay_ExtraTex_Map with VRayDirt. I think it is faster, but there is a problem with the loft objects.