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Vray 3.0 - black render output
show user profile  Madredchris
Hi guys,

I am currently working on a small interior render with vray 3.0.
I am using a preset which I have been using a while now, and its the first time this is actually happening.

I am using irradiance map + light cache.

I have seriously - NO - idea what is going on here.
Here is the gallery of my issue

Greetings, Chris
read 318 times
4/8/2015 5:42:30 PM (last edit: 4/8/2015 5:42:30 PM)
show user profile  mike_renouf
I think you need to break down the scene step by step to diagnose what's happened. There are too many factors which could be at fault just looking at the info you've posted.

What settings did you actually "crank up"?

read 313 times
4/8/2015 5:49:16 PM (last edit: 4/8/2015 5:49:16 PM)
show user profile  Madredchris
This is what I changed:

- Replaced brute force with light cache
- I have upped the irradiance map a bit, but nothing too special.
- Replaced my dark wood material on the table
- Moved a cup to the other side of the table.
- Cut of the table cloth so it doesnt hit the ground anymore.

Weird thing is:
If I region render, it works just fine. if I render the full scale image, it does this.
read 310 times
4/8/2015 5:58:50 PM (last edit: 4/8/2015 5:58:50 PM)
show user profile  mike_renouf
Have you saved out your irradiance map and light cache? If so, maybe those files are faulty? It certainly looks at first glance like a lighting issue.

read 308 times
4/8/2015 6:01:37 PM (last edit: 4/8/2015 6:01:37 PM)
show user profile  Madredchris
I never save those manually. Didn't even know that was possible.
Offtopic: Does that speed up my render times?

Ontopic: I will now just merge my models in a new scene with fresh settings, then use the preset again and see what happends.
read 303 times
4/8/2015 6:12:12 PM (last edit: 4/8/2015 6:12:36 PM)
show user profile  Madredchris
That did not work, but I did find out it comes from skylight portals.

If I remove them, nothing is wrong. But when I add them, it just ruins everything.
read 292 times
4/8/2015 6:51:27 PM (last edit: 4/8/2015 6:56:54 PM)
show user profile  mike_renouf
If you have to re-render similar shots again and again, or you're tuning the materials in your scene then it is a good idea to save your light cache and/or irradiance map files so that they don't have to be calculated every time. Its by no means vital though.

If you're creating animations with many frames then this pretty much vital though.

read 264 times
4/9/2015 9:51:48 AM (last edit: 4/9/2015 9:51:48 AM)
show user profile  Madredchris
Okay awesome, i def need that because I tune my mats a lot. How do I do that? :D
read 251 times
4/9/2015 5:11:44 PM (last edit: 4/9/2015 5:11:44 PM)
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