Where is the light? IRay question

Philopp

Hello,

somehow I don't understand iRay and its lighting:

I simply took the South Beach Deco 3 - Bath that came out yesterday. Put a default camera in it, shut off the head light of the camera, pointed the camera to one of the two lights. Set the Emission color of the light to yellow and did the render (I didn't finish, but it is obvious for my problem). Now where is the light?

Somehow iRay and the lighting is driving me mad. I simply don't understand what is going on here. Sometimes it works, sometimes don't, and I have no clue why something is working or (like in this case) why it is not.

Greetings

P

Richard Haseltine

Where was the light? In Iray, using the default Photoreal mode, lights always cast shadows so if it was outside the room it might well be blocked. Also, remember that the Tone mapping settings (Render Settings pane) are for outdoors, lit by an HDR image - for an inddor scene you will want to rasie the Camera ISO, lower the shutter speed, or lower the fStop - or some combination of those.

AndyGrimm

Switch luminance units to something which you know from real lights! Watt or Lumen.... right now you use candela per m2.

Way easier is: 

1500 Luminance = average of a 100 watt bulb is 1500lm.... change units to Lm (Flux lumen)

or 100 Lumin​ance and unit to watt, Lm/watt 15 = 100 watt bulb.

Your example above using candelas/m2 added to one of your lamps (small area and source of light instead the ligths lumincane intensity (candela) on 1m2) -) means you have close to zero light.
 

 

 

Emission color... i would let it white.. and use color temperature instead.... a old 100watt bulb has 3000k (yellow light)

thungsteen cold neutral = 5000k


If you still cant see light - check your camerasettings (tonemapping).....    

For intereriour rendering a good start is:

Shutter 60
F-Stop 5
Iso 200

still nothing to see: check that you have environment mode.. scene only or if you have light from outside falling in your room (windows) dom and scene.