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paulselhi

Take A Break From Gi

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Did someone say "lighting challenge"?!

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StCanas    13

Steve, I think you've hit the nail firmly on the head.

Cheers

Karl

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Vozzz    80

I dunno, what's the big deal either.

I love Gi coz it generally cuts set up time by like 10x. That means that you can send it off to render really quickly, and start working on your next project or watever.

Also someone mentioned using a the mograph skylight thingy. which produces great results. but it is most definately not faster than Gi. atleast not vray Gi.

I personally rarely go for realism, but i still love what Gi does. I honestly don't see myself doing anything except maybe technical or 2d style animations without gi.

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paulselhi    23

ScottA.. my initial post was meant to make people think about whether they really needed GI in a render and to suggest that people investigate lighting setups more. I never said that GI was to be totally avoided, i never said to ignore GI

You seem to have it in your head that I am some sort of GI Luddite and you are a defender of innovation. You seem to have taken on the idea that I stand against GI and it is your sacred role to defend it.

Lets get it clear, i am not aginast Gi, i use GI, I have made tutorials about GI. A good GI render has me really bashing the bishop.

But I will stick to my original point that there are many times when GI is not needed and a good light setup MAY end up being a lot more predictable, stable and better for such things as object animation and net renders.

My intention was to state that with all this desire for "one click" GI solutions to scene lighting many people are ignoring the development of their lighting skills.

Personnaly i don't really care to much how you light your scenes, what ever floats your boat.

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dataflow    17

i think if people are learning a 3d app then they should work on the lighting skills (with lights) before they move on to Gi.

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StCanas    13

Looking at many scenes that people have issues with i often think..does this really need gi? Why is it that we have become so obsessed with doing every render with gi and often overlook the critical role lighting plays in a render.

i think if people are learning a 3d app then they should work on the lighting skills (with lights) before they move on to Gi.

And it's not our place to try and force him to change his mind.

Paul's premiss is absolutely right, people are splashing GI all over the place and often quite unessesarily. Here is an example that perfectly illustrates Paul's point...

http://www.c4dcafe.com/ipb/index.php?showt...=42573&st=0

As data says, people should learn to light, not just reach for the perceived magic bullet of GI. In fact, a lot of people simply need to learn what Gi actually is for starters. The general misconception is illustrated in post #24 in the above thread and the reality is touched upon in Steve's comment above in this thread.

I'm a big fan of GI renders, but there's a time and a place. And it's rarely a substitute for putting a good lighting setup in place.

And no-one is trying to force Paul to change his mind. Why would we, he's right...

Cheers

Karl

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paulselhi    23

If you look at the image i posted above then interior lighting is not always that difficult. I have only 8 lights here, 4 on the right acting as windows, one behind the camera and to the left acting as fill, two placed near the ceilings in each room acting as global fill and one on the floor pointing up being the floor light

for exteriors most people use 1 bounce in gi so a lighting setup that emulates that is fairly simple. A sun light and a dome hemisphere light and perhaps a floor/ground light simulating the bounced light from the ground the new sky automates that and that is why if you use it for an interior scene you will get a blue ambient look, this is due to sky dome light option in the details tab

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StCanas    13

Is the one you've used on the floor one big Area Light?

Cheers

Karl

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paulselhi    23

yup, maybe should have made 2..not sure

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dataflow    17

you just have to recreate what Gi would do.

simulate the bouncing light of Gi.

so you have to figure out what would be the strength of the light that would bounce off a surface.

then create a light that matches and pointing the direction the light would bounce

i read in the past about the ice age movie that Pixar made and it said they use over 30 lights in 1 scene.

so dont be worried about how many lights you have

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