lor
Hello ladies & gents,
I don't disagree that exposure , Fstop, Tstop, shutterspeed/angle should be a part of our toolset. Absolutely they should. But they should do what they do in a camera not something vaguely similar that can be roughly explained through convoluted logic. This control is not analogous to F-stop or Tstop, which affect all lights. This is a per light intensity control.
We have two things on set related to light. Lights and a camera. Lights put out a certain quality/quantity of light. Cameras receive it. Light intensity controls the quality/quantity of light coming OUT of particular light source. (This is what the new houdini light "exposure" control does). Camera exposure affects the light coming IN to the camera. the new houdini light "exposure" control does not do this. It's pretty simple. The exposure control doesn't control exposure.
We need a physical camera with functional exposure control.
For an example of a great physical camera, have a look at VRay.
In Houdini, the shutter"time" and fstop controls have no effect on exposure. There is, effectively no exposure control in houdini, making light intensity values arbitrary. So I can see why people are asking for exposure control, but it would be nice if that was actual exposure control, not a secondary exponential light intensity control, per light.
@Andy58, thanks for that quote. It is my opinion that lighting people SHOULD have to use huge values like 10,000. In this way they can begin wrapping their heads around the real nature of light. That's what real light intensity actually is! It is essential we break away from the old thinking that lights need to be at or below 1.0 int. Artists who start to get a handle on how friggin bright lights actually are tend to do better work and use their tools better, IMO.
Nick
@lor, Regarding "It is my opinion that lighting people SHOULD have to use huge values like 10,000." Do you only use the linear intensity still, even when working with spotlights?
Spotlights is the reason I started to use exposure on the lights instead. Hated those crazy high intensity values.