Testing Vray, need visopts

stefanq · 4 Nov 2012, 16:28

Hello Pete! Here is a good one (by Fernando) where he's doing something that I find myself doing it often lately, and that is, starting with default settings. The most important trick I've learned from this, is to make use of the skylight (no sunlight mapped in that slot) instead of putting rectangular lights in the windows. In this way, you don't have to deal with artefacts from the lights, subdivisions etc. His final render looks impressive.
Here is the tutorial, it's only 10 minutes long:
http://www.youtube.com/watch?v=DCIngKllJnk&list=FLiETg2Y2_Rbm0MbNiljVpqg&index=1&feature=plpp_video

stefanq · 4 Nov 2012, 16:33

Here is another one:
"Fernando Rentas explains how to use the sun in combination with HDRI to illuminate an exterior scene and produce sharp shadows from the sun in this video tutorial."
http://www.youtube.com/watch?v=D3-TxEzW4sQ&feature=BFa&list=SPE2F8B612F375E98E

andybot · 4 Nov 2012, 17:00

@Tom, (oops, I had some hidden lights I left on that messed up the comparison, I edited this post.) For comparison, I use higher hsph subdivs in my irradiance map, and add GI lighting to increase the illumination through the windows. Something odd happening with your AA sampler selection, see the fringing?

Andy

Here is a comparison:

_interior_andybot-medium-Q.zip

Stinkie · 4 Nov 2012, 21:11

@andybot said:

Something odd happening with your AA sampler selection, see the fringing?

Yeah, I do. Odd, indeed. That's not happened to me yet. Must've erred somewhere. Biased render apps and their gazillion settings!

@andybot said:

(...) GI lighting to increase the illumination through the windows.

What do you mean? Portals?

stefanq · 4 Nov 2012, 21:33

@unknownuser said:

@andybot said:

Something odd happening with your AA sampler selection, see the fringing?

If I had a penny every time I said this: " check clamp output and sub-pixel mapping" , those are white values, bigger then 255. V-ray just doesn't know how to represent them.
What do you say guys, Pete has resigned ?

Stinkie · 4 Nov 2012, 21:49

@stefanq said:

If I had a penny every time I said this: " check clamp output and sub-pixel mapping"

Weird. I've rendered with both unchecked without problems -or so I think. I should delve into this as soon as I get my new machine.

andybot · 4 Nov 2012, 22:55

@stefanq said:

@unknownuser said:

@andybot said:

Something odd happening with your AA sampler selection, see the fringing?

If I had a penny every time I said this: " check clamp output and sub-pixel mapping" , those are white values, bigger then 255. V-ray just doesn't know how to represent them.

Exactly right! Thanks Stefan - I didn't think to check that. Here it is with both checked.

@unknownuser said:

andybot wrote:
(...) GI lighting to increase the illumination through the windows.

What do you mean? Portals?

Tom - I changed the GI from sky texture to none, and increased the multiplier to 4.5. I also decreased the sun intensity to get less harsh shadows where you do see the sun in the interior.

solo · 4 Nov 2012, 22:59

@unknownuser said:

Pete has resigned ?

Nope, watching y'all discuss stuff, quietly carring on on my side.

Thanks for all the links guys.

dkendig · 5 Nov 2012, 04:14

I hope you get up to speed in time for beta to start. The next version has a bit more pep in it's step.

kwistenbiebel · 5 Nov 2012, 05:52

@dkendig said:

I hope you get up to speed in time for beta to start. The next version has a bit more pep in it's step.

good news

thomthom · 5 Nov 2012, 08:22

@stefanq said:

If I had a penny every time I said this: " check clamp output and sub-pixel mapping" , those are white values, bigger then 255. V-ray just doesn't know how to represent them.
What do you say guys, Pete has resigned ?

It's our puny screens rather - if you want to use higher bitdepth for post editing you cannot use the clamp feature. But you'll get the full range of light data.

andybot · 5 Nov 2012, 09:03

actually, it was just the sub-pixel mapping that was needed. It renders fine with clamping off. Good point about not clamping output - even if you don't save to HDR, you can't use the levels adjustment in the vfb if something is blown-out.