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666 Chapter 20: Managing Scenes and Projects

high-dynamic-range data only if the renderer

supports floating-point output. Currently the

mental-ray renderer supports floating-point

output, while the default scanline renderer does

not.

If you ’re rendering with mental ray (be sure to

set

Frame Buffer Type

to Floating-P oint (32 bits

perchannel))oranotherrendererthatsupports

floating-point output, using this option ensures

the highest-quality HDR data in the saved

image file.

IFL File Format

IFL Files

AnIFL(ImageFileList)fileisanASCIIfilethat

constructs an animation by listing single-frame

bitmap files to be used for each rendered frame.

When you assign an IFL file as a bitmap, rendering

steps through each specified f r ame, resulting in

an animated map.

(In a similar way, if you assig n an AVI file, FLC file,

or MOV file as a bitmap, rendering steps through

each frame of the animation.)

For example, if you assign a 10-frame FLC of a

blink ing red "Danger" sign to a material’s diffuse

component, apply the material to a cube, and then

render a 30-frame animation, the cube displays the

blinking red Danger animation three times.

The

.ifl

file lists the bitmap files to b e used with

each frame. You can append an optional numeric

argument to each file name to specify the number

of frames of rendered animation on which it is

used. For example:

The IFL file listed above specifies

sand.tga

to be

used for t he first 2 0 frames,

pebble.tga

to be used

for the next 40 frames,

stone.tif

to be used for 20

frames, and

boulder.tif

tobeusedfor20frames.

Tip: Specify only the fi le names in your IFL files.

Thefilepathscanbederivedfromthemappaths

established in your preferences. See

External Path

Configuration (page 3–855)

.IFLfileswithpath

names can be used only on the system on which

you create them.