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| Since | 11.0 |
Old network
As of Houdini 20.5, use Copernicus nodes instead of Compositing nodes. Though both networks still exist, the Compositing network is now designated as COP Network - Old. The Compositing network and its nodes will be deprecated and then removed in a future Houdini release.
This node generates a multi-plane image. The image has named planes Left,
Top, Bottom, Front, and Back. The C plane contains the “right”
plane.
You can use this image in shaders with Environment map or Reflection map
parameters. You can render the image to disk using a
Composite output node, or refer to this node’s output
directly using op:. For example, if you have a Sky environment map node
at /img/skyenvmap1, you can refer to its output in a shader parameter using
op:/img/skyenvmap1.
Note
Sky environment map is a digital asset. You can double-click it to go inside and find two lower-level asserts, skycube (for ramp-based images) and skycubedaylight (for simulated images). These assets may be interesting to technical users as examples of VEX-based compositing nodes.
Parameters ¶
Sun ¶
Use
Controls which of the following parameters are available to set the position of the sun in the image.
Rotate
The Euler rotation angles to align -Z axis vector towards the sun.
Direction Vector
The explicit vector that points towards the sun.
Azimuth
Azimuth of the sun in the image. Note that the default plane (C) shows the
right view, so 90 will put the sun straight ahead in that view.
Elevation
Elevation of the sun in the image.
Latitude
Latitude of the observer, used to compute the position of the sun based on the date when Use is not Angle and elevation.
Longitude
Longitude of the observer, used to compute the position of the sun based on the date when Use is not Angle and elevation.
Date
Date of observation, used to compute the position of the sun when Use is Location, date, and time.
Time
Time of observation, used to compute the position of the sun when Use is Location, date, and time.
Day of Year
A (fractional) day of the year (for example, 0.5 would be noon on January 1), used to compute the position of the sun when Use is Location, date, and time.
Sky ¶
Use
Controls whether the sun is rendered using a physically realistic simulation or using an artistically controllable color ramp.
The Realistic option is especially useful when animating the time of day, since it automatically produces realistic colors for sunrise, sunset, high noon, and so on. The Ramp option gives you artistic control of the colors, but does not simulate atmospheric effects, for example along the horizon.
Haziness
Controls how sunlight scatters in the air, used when Use is Realistic.
Brightness
Controls the brightness of the sky, used when Use is Realistic.
Color ramp
Manually sets a color ramp from the sun to the surrounding sky, used when Use is Ramp.
Ground ¶
Render Ground As;
Albedo
Sets the albedo of the ground.
Normal
Sets the orientation of the ground plane. Only used when Use is Ramp.
Horizon elevation
Sets the horizontal elevation of the viewer. Only used when Use is Ramp.
Locals ¶
L
Sequence length
S
Start of sequence
E
End of sequence
IL
Input sequence length
SR
Sequence frame rate
NP
Number of planes in sequence
W,H
Width and height of image
I
Image index (0 at start frame)
IT
Image time (0 at start frame)
AI
Current plane array index
PI
Current plane index
PC
Num of channels in current plane
CXRES
Composite Project X resolution
CYRES
Composite Project Y resolution
CPIXA
Composite Project pixel aspect ratio
CDEPTH
Composite Project raster depth
CBP
Composite Project black point
CWP
Composite Project white point
