Fakeiosity: How to?

[nisus]

Hi all,

 

Delfoz's post - a great lesson to many - in the challenge section inspired me to set up this new thread. Check out Delfoz tips at: http://www.cgarchitect.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=33&t=000014#000010

 

Feel free to add any tips or questions.

 

rgds

 

nisus

[nuno]

what about 'vertex colors' too?

i just did this test today, but i am not very confortable with max.....so can anyone give some tips about 'vertex colors'?

 

 

best to all,

nuno

[nisus]

Hi all,

 

For exteriors I still prefer a light dome (101 spotlights SM with a very low map size) and an additional lower light ring (21 spotlights without shadowcasting with very low map size) to light up the bottom faces.

Next I add a sunlight with a high contrast setting.

 

For interiors I mirror the sunlight (shadow) over all wall directions (axis) and dimm the bounced sunlight spots (no shadow cast).

Than I add attunuated omni's at the place of a lightfixture and additional ones on the large surfaces to simulate bounce-lights.

 

rgds

 

nisus

 

SM: shadow map

[ingo]

Hi all,

 

just curious, why dont you use raydiosity ? Its faster to set up and mostly faster than render a skydome with more than 100 lights with SM (i mean SM for shadow mapped, not what you think ).

And with the skydome lights or backdrop raydiosity you miss the additional lightbounces of raydiosity that make thinks look better, especially in architecture.

Since raydiosity is available why dont you use it. In a few years you are forced to use raydiosity, so why not invest your time in learning raydiosity instead of using old fashioned methods ????

 

Just my two cents

 

ingo

thinking different, eh

[DelfoZ]

Not all peoles have Viz 4 or Max 5, and the Max 4 and viz 3 or less dont have $$$$ to buy a brazil, final render , lightscape, Vray etc, etc, And always is good to know a Old methods,

Is like hand-draws, u need know a traditional methods to know the new motods (PC).

 

In the past i use Final render for exterior, now i like more the Fakradiosity, more easy, and same result, ( no bounces/bleed of curse ) But nice images and more quikly renders for Videos,

Interior images i prefer Radiosity,

[ingo]

>> Not all peoles have Viz 4 or Max 5, and the Max 4 and viz 3 or less dont have $$$$ to buy a brazil, final render , lightscape, Vray etc, etc,

 

Well, i dont have one of Autocads addon renderers, simply to expensive and not useable for detailled work, not to forget the limited im- and export possibilities. But youre right, knowing the old methods is good before you start with the new.

 

ingo

[ingo]

Ok, here's by old lightrigg from the before-raydiosity age. As you see these are 3 x 6 lightrings with SM-spots (i love these abreviations), and an additional distance/parallel bottomlight without any shadows.

 

regards

 

ingo

 

[DelfoZ]

and the result ? post the render too

 

And u right Fakeradiosity r a old technique, and u need experience to use radiosity.

Maybe if u r new in 3d, Fakeradiosity r a exlenet tool. or used in school, if the school only have Max4 or Max5 ( not too much time to learn all Max Stuffs in 6 months 3 hours per week) or in a small office with low resources . etc etc.

[nuno]

anyone who can help on 'vertex color' too?

 

nuno

[ingo]

Hi Nuno,

 

well from my short experience you need to subdivide the polygones into smaller ones too much to get the desired result. But vertex maps are good for making dirt maps or something where you want to blend one texture into another. I think its easier to paint your raydiosity onto UV maps for the luminosity or diffuse channel.

Anyone experience with the good old gMIL fake-raydiosity shader ?

 

ingo

[STRAT]

http://www.the3dstudio.com/tutorials.asp?id=97

[kevp]

Here's two tutorials on faking GI i found useful, one is for an interior one is for an exterior:

http://www.michaelscholz.de/neuehomepage/tutorial/

[T']

hi all,

 

first of all, i think radiosity is a fantastic invention, render with absolute accuracy, but it is good only if you have a really 'powerful' pc. Try radiosity on your p4 3G, 1G DDR RAM, Gforce FX, it is still going to take long to finish one good render, it is meant for render farm to be honest. so, fake radiosity - set up a dome of lights - is still the fastest method to fake it! trust me that's why we are still using it for exterior rendering

[kid]

...but it is good only if you have a really 'powerful' pc...

not entirely true. Radiance runs well on pretty much anything.

 

 

...probably even on STRAT's laptop