Illumination with LW / Archi CAD 9

[Anonymous]

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....

[Anonymous]

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,

[Dwight]

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.

[Anonymous]

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?

[Dwight]

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.

[Dwight]

General Light

Falloff 0 Falloff 5

Which one makes the more satisfying effect?

[Anonymous]

Falloff 0

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

I will try with your sugestion.
Wait a minute

[Dwight]

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.

[Anonymous]

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...

[Anonymous]

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