interior render

[illyrianeye]

using daylight from outside with radiosity.

please comment

 

 

two things i have a problem with, the wood is supposed to be a dark walnut wood, and i have lowered the reflectance to about 5 but still get a bright wood.

 

secondly, i can never get metal looking like metal with radiosity.

 

[Buffalo Bills]

Illyrianeye,

 

To get your wood to be the color you are trying to get it to render out correctly, I would lose the reflective map you chose to use in your material editor. To darken you material you need to go to your material editor window find you wood sample, click on the sample in the diffuse color box, scroll down and open the output rollout section. Find the enable color map box and check it. This will turn on color map slider box below. I usually keep it on mono and move the line from the right side down to darken the map. Adjust it to your preference. But you should see the change when rendering it out.

 

If you want to have the wood be reflective I would use raytrace in the reflective box in your material editor. Then adjust that according to your preference on reflectiveness. This is how I would do it, the reflective part will cause your rendering time to increase.

 

As far as the metal is concerned I will have to leave it to someone else to give you pointers on it. Hope this helps

[Fran]

Hi Beni,

 

What are your exposure settings? It looks like you've got brightness too high. Also, some color bleed is good, but there is too much coming from the wood bitmap. I usually set the color bleed scale to 50%. You will have to recalculate to get rid of the excess bleed. As Michael said, you should adjust the output settings in the bitmap rollout for the wood material. That part you can test without recalculating.

 

For the metal, are you wanting something shiny or also reflective? For specular reflections, try adding an omni or two that are set to Specular only. Then adjust the specular and gloss in the material editor.

[schmoron13]

for the metals, check out the tutorials here . The site is called secondreality and you can find different tutorials for metals (I think they have raytraced generic, steel and aluminum metals, and non-raytraced rusty metal)...

 

just click on the "tutorials" link on the homepage...super easy to do.

 

hope this helps

[Fran]

Ummm. Beni. I think the pink cast is from the sunlight color. Also, use a Free Point light set to specular-only, not an omni. Exclude the point light from radiosity too. For the 2 images I've attached, color bleed for the wood is 50%. In the second image, I also adjusted to sun color to something less orange and more pale yellow. I hope that isn't a gross miscarriage of the laws of physics. Log Exp control settings are brightness 50 and contrast 55.

 

[illyrianeye]

ok guys, here is the updated rendering.

 

i lowered the output for the wood to 50. and that did it

 

i added an omni light, specular only, for the metal and the barcelona chairs.

 

im using a daylight system, set to new york city, with the current date on it.

 

-exposure is, logarithmic, daylight checked, exterior unchecked, brightness is 65 and contrast 50

 

another thing is

i want to create a rendering, with just daylight, in other words, i want to stimulate real world lighting, i dont want to use additional lights for the specular, and i couldnt do it.

also how do i get rid of the rough ceiling on the platform bottom? ive tried everything

 

thanks for all your comments

[Fran]

Originally posted by illyrianeye:

...

another thing is

i want to create a rendering, with just daylight, in other words, i want to stimulate real world lighting, i dont want to use additional lights for the specular, and i couldnt do it.

also how do i get rid of the rough ceiling on the platform bottom? ive tried everything...

Hi Beni,

 

Because of the nature of radiosity, all the interaction of the indirect lighting tends to kill specular highlights.

 

Are you using a bump map on the platform surface? If so, try a radiosity override material and reduce the bump scale.

[illyrianeye]

Fran

The material on the walls is the same as the rough material on the under part. i will try the overide material, and post the results, thanks for the info.

[MegaPixel]

I apoligize in advance for not having anything to add to the original posters questions.

 

Fran,

 

I was just looking at your website and I must say that your work just plain Rocks! You clearly have acheived a level of mastery with your Lighting Setup. I was wondering if you could explain how you setup that basic scene posted above for me - perhaps in a mini-tutorialistic format. That is the classic beginners Radiosity scene which I have been trying to reproduce with little success since I purchased MAX 5.1. I think I need a grip on which Lights to use, there settings and perhaps a Recommended Material usage for Rad. scenes as well.

 

Oh BTW, is that you in your avatar image? If so, you kind of look like Enya the singer. Have a good one, Mega.

[Fran]

Originally posted by MegaPixel:

... I was wondering if you could explain how you setup that basic scene posted above for me - perhaps in a mini-tutorialistic format. That is the classic beginners Radiosity scene which I have been trying to reproduce with little success since I purchased MAX 5.1. I think I need a grip on which Lights to use, there settings and perhaps a Recommended Material usage for Rad. scenes as well.

Thanks for the compliment.

 

- For interior scenes lit with daylight, I make sure the walls are not single thickness.

 

- I used a Daylight System with IES Sun (color adjusted to pale yellow) and Sky with shadows on (store sky shadows in the mesh). The shadow type is Advanced Raytraced with Shadow Integrity at 5 and Quality at 8. Shadow spread is 3.0. The rest are default settings. I disable the optimizations though.

 

- The flat wall paint is Standard (H 38, S 11, V 201) and should have a reflectance value less than 80%.

 

- The bitmap for the wood is at a 50% Color Map setting (Mono). A Radiosity Override is also applied at 50% color bleed. I enabled Attenuation for the Raytrace material in the reflection slot. You just have to play with that.

 

- I used a free point, set to specular only, to get the specular highlights to show up on the post.

 

- The radiosity settings are a bit much, but it calculated in 6min 39sec, so what the heck?

- IQ 99%

- Global mesh 8" (don't mesh the exterior shell and be sure and exclude it from regather)

- I stored 20 refine iterations in the interior walls and floor.

- This scene was rendered without interactive filtering or regather at 11sec.

Originally posted by MegaPixel:

Oh BTW, is that you in your avatar image? If so, you kind of look like Enya the singer. Have a good one, Mega.

Yes, that's sort of me. Lot's of contrast. Lots and lots. I actually look more like this:

[illyrianeye]

Fran

Why would you exclude the shell from meshing?

[Fran]

Originally posted by illyrianeye:

Fran

Why would you exclude the shell from meshing?

Hi Beni,

For strictly interior shots, having the exterior shell separate from the interior walls and excluding it from meshing can save memory and computation time. It really saves if you need a fine mesh on the wall surfaces and if your structure is quite large.

[illyrianeye]

I model everything in cad, have no idea yet how to separate the meshes, but ill experiment right now.

 

this forum is slooooow.

took me 5 min to write this reply. ahhhhh

 

one more thing

whats the best way to create a pendant light?

[MegaPixel]

Fran,

 

Thanks a ton for replying so soon. I would never have thought to seperate the exterior walls from the interior. Indeed there is alot to be said for planning and optimization. I actually understood everything you said. The only thing I have not done yet was actually select individual objects to preform the Refinement on. I'll have to play with that. Oh and just to clarify, you used an IES Sky and not a Skylight in your Daylight System yes?

 

Thanks again, MegaPixel

[illyrianeye]

Yes, isnt she greatttt?

 

 

Fran, are you running for president?

 

 

thanks for all the help

[mbr]

While on the subject of Fran, I was wondering what your background is? Needless to say, your renderings are nothing less than superb. The mood they set is something I rarely, if ever, see in CG (and rarely in good arch photography).

 

Just curious. A great eye and mastery of the programs - a rare combinatino, for sure.

 

I look forward to seeing more of your images.

[Fran]

Originally posted by illyrianeye:

I model everything in cad, have no idea yet how to separate the meshes, but ill experiment right now.

Hi Beni,

 

You should be able to select individual mesh faces and detach them in the Modifier stack. When you select multiple faces they will form one object.

 

one more thing whats the best way to create a pendant light?

I just use free point lights and rely on the fixture geometry to direct the light. If it is a linear pendant, I use one of the photometric presets from the Create->Lights menu.

 

Originally posted by MegaPixel:

...Oh and just to clarify, you used an IES Sky and not a Skylight in your Daylight System yes?

Hi David,

 

Glad I could help. Yes, I use IES Sky, but I usually can't tell the difference. :???:

 

Originally posted by mbr:

While on the subject of Fran, I was wondering what your background is? ...

Thanks for the encouragement Markus.

 

I started architectural drafting in 1987. In 1989, I started learning AutoCAD. I started learning 3d modeling and rendering at another firm in 1996. I started free-lancing after my son was born in 1998.

 

I've always been interested in photography (I get that from my dad). I always got high marks in elementary school for "Pays attention to detail" and penmanship, if that matters at all.

 

[ October 13, 2003, 09:17 AM: Message edited by: Fran ]

[illyrianeye]

one more thing whats the best way to create a pendant light?

I just use free point lights and rely on the fixture geometry to direct the light. If it is a linear pendant, I use one of the photometric presets from the Create->Lights menu.

 

well what it is is, a pendant fixture, glass with a metal rod for ex.

do i instert the light inside the glass fixture and reduce the opacity? or do i extrude the glass from casting shadows.

 

in other words, do i build a fixture as in real life and for the bulb, insert a photometric light?

 

thanks for all the help

[Fran]

Hi Beni,

 

The glass can cast shadows. Light will be transmitted through it based on the transparency of the material.

[illyrianeye]

Originally posted by Fran:

Hi Beni,

 

The glass can cast shadows. Light will be transmitted through it based on the transparency of the material.

Great, thanks

i will post some images, its a lounge project im just starting, havent really used any photometric lights with radiosity yet, all my renderings with viz were wit daylight.

[illyrianeye]

ok here it is

dont mind the materials yet, i have a free point light on every fixture, with raytraced shadows