topic Re: Illumination with LW / Archi CAD 9 in Visualization

Illumination with LW / Archi CAD 9

Anonymous — Thu, 11 May 2023 12:36:02 GMT

As you see, I have following problems:

I illuminate the ceiling with general lite. But it looks little bit holloween....
I put hallogen lamp over the chair, but the color of wall is no more white (the actual material is white plastering wall)

Please help..... rescue me from holloween....

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 11:28:57 GMT

Guten tag Jakop,

I don't understand the 'haloween' effect. But anyway, the colour of the wall you see is also affected by the colour of light. Also you may download the paint.lwa from lightworks-user site and use white paint for your walls. Try also to play with light intensities and reflectance of wall material. Generally the result we see is a result of various things so play around with everything.

Regards,

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 15:24:37 GMT

Since the general light is easy on the rendering engine, in this case - with a simple scene, it is a better choice than the window light turned upward, but I agree that the ceiling color is the main problem.

1: Try a much weaker general light with lots of falloff, since light is varying all the time. Place it closet to where you want the viewer to think light is coming from in the room scene.

2: increase the roughness of the ceiling - displacement - to about .01 and give every surface in the room some color - even if it is grey. There is no such thing as white.

3: always have a combination of cool, blue light and warm, yellow light in a space. This is more realistic and makes plain sufraces more appealing to the eye.

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 18:21:07 GMT

Thanks Dwight.

I made general lite weaker (What is falloff? Is it important?)
The ceilingmaterial has been changed.
I gave the room color (first just for test)
Every lite has yellow color.

...still not so good....
...it is very stupid library lampobject, becaus the hallogenlamp has no lite, but dark...nor real...or?

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 18:35:52 GMT

That rendering is much better, but you should really be sculpting and lighting the space with window lights and general lights to get the luminescence you seek.

You mean the lamp filament is invisible? Tough.

Two workarounds:

1: Place a power=1 general light against the front face of the lamp to glare into the camera.

2: make the actual lamp material white with constant reflectance. - this is best for fluorescent panels.

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 18:37:09 GMT

General Light

Falloff 0 Falloff 5

Which one makes the more satisfying effect?

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 18:56:53 GMT

Falloff 0

I didn't know, it is so easy....

I will try with your sugestion.
Wait a minute

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 19:12:27 GMT

AAAAAArgh!

Where I am going with this:

Light varies on surfaces. We need light sources that vary.
The illuustrator seeks a modulated space that shows all details and a sense of form - in a constantly varied space.

In creating Fakiosity™ variety of light is key. color and intensity.

Try this scene with lots of falloff - and make your general light yellow - say RGB 255.240.140

Find a blue light source, too.

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 19:17:29 GMT

Dwight wrote:

1: Place a power=1 general light against the front face of the lamp to glare into the camera.

2: make the actual lamp material white with constant reflectance. - this is best for fluorescent panels.

I think, it is just possible, if material from glass is (neonlight)
Otherwise it is impossible, there is no possibility for permanant reflectance...

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 19:36:48 GMT

It sounds very difficult....but I will try (just do it!)
Tomorrow I will be illustrator.

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 19:47:18 GMT

"Its a trick!"

- theme tag from new book, following close on the success of "a picture is just a bunch of dots" from first book.

Do you think I should trademark "Fakiosity"?[formerly known as "Photodream."]

The GDL code used to generate light have nothing to do with the object looking like a light source. The appearance of the lamp is a separate issue. Make the discs of your downlite constant reflectance white and see what happens.

What, exactly, do you mean by "permanent reflectance?"

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 21:23:20 GMT

Dwight wrote:

What, exactly, do you mean by "permanent reflectance?"

I meant "constant reflectance".
Still I could'nt find constant reflectance.....
Maybe it is because of English.....
I made downlite color to white, but it looks not real and very cold.
I did your yellow color.
The problem is ceiling. I put 6 general lite with 7% intensity, and with your yellow color.
It is still not 100% satisfied, but I must say, I had never such like good rendering.
It thanks to you.

Re: Illumination with LW / Archi CAD 9

Anonymous — Thu, 31 Mar 2005 23:05:35 GMT

I am sure, your book will help many Archi - Users.
In my opinion illustrator is special job with special skill.
But architects must know to use at least now LW from Archi CAD.
It will help very much to understand and to develope our concepts.
As architect you can make architects understandable.

Re: Illumination with LW / Archi CAD 9

Dwight — Thu, 31 Mar 2005 23:16:34 GMT

Remember : "It's all fake."

Re: Illumination with LW / Archi CAD 9

Anonymous — Fri, 01 Apr 2005 09:47:56 GMT

It is fake, but also skill and little bit faked realistic image.

In my opinion (as architect not as illustrator) LW is quite enough for render work.
To buy Artlantis....first I want to learn further LW.

Re: Illumination with LW / Archi CAD 9

Dwight — Fri, 01 Apr 2005 09:54:23 GMT

here

Re: Illumination with LW / Archi CAD 9

Anonymous — Fri, 01 Apr 2005 10:59:32 GMT

Thanks
I'll try again. To find out such like thing is difficult for normal human being or ordinary people
Don't forget this for your book:

LW for Stupy

Re: Illumination with LW / Archi CAD 9

Dwight — Fri, 01 Apr 2005 15:11:16 GMT

That entire menu holds cryptic words that describe important surface reflection behavior. But who could have guessed that years ago Henry Miller wrote about one of them in his potboiler novel the Anisotropic of Capricorn.