Bryce 5 Light Range Comparisons

 

Normal Radial Light

100 BU (BryceUnit) rulers with 10 BU ticks.

Intensity =50

 

Note that as the intensity increases (or decreases) so does the range.

Intensity =100

Ranged Falloff Light

Intensity =100 Range=100

Note that the light now fades completely out at 100 BUs.

 

Intensity =50 Range=100

Note the Intensity has no effect on the range of the light.

Gradient Falloff Light

Intensity =100 Range=100

Note that this is almost exactly the same as the Ranged Falloff light.

 

Intensity =50 Range=100

Note that this is almost exactly the same as the Ranged Falloff light.

Ranged Falloff On and Gradient Light On

Intesity=100

Ranged Falloff: Range=100

Gradient Falloff: Range=100

With both ranges turned on the result appears to be subtractive. The Falloff setting should always be set to None with Gradient lights. With the default Gradient Falloff of 50BU's and Squared Falloff selected, it produces a range so short that it can appear to be "off"!

Gradient Falloff Light with a different Color Gradient

Note that with a Ranged Falloff light the actual falloff can't be changed (it's always Linear). With Gradient lights there are two ways to control the falloff: Color and Transparency. The Color Adjust "tints" the light with the gradient colors across the range of the light and is 16-bit RGB color. I've used white to black here but it could be any colors.

Range=100 Intensity =50

Gradient Falloff Light with different Color and Transparency Gradients

Range=100 Intensity =50

The Transparency Adjust changes the transparency of the light with a grayscale gradient across the range of the light. Black has no effect on the light's intensity while white completely blocks the light (or Intensity = 0). In the above examples I've purposely "overblown" the lights to better show the ranges. In the examples below (using the Color Gradient above right) I've used the Transparency to scale the lights down to a more reasonable level by setting the beginning Opacity to 15 and fading to 0 (white) with two different gradients.