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Each file in the HDRI library is made up of several lighting attributes. The four lighting attributes that contribute to each file are Style, Tone, Configuration and EV Offset Value. For each of the six Styles of lights there are six Tones, six Configurations and four EV Offset Values. Apply these to the six positions available on a Cubical Map and you have a tremendous amount of flexibility in lighting setup. These lighting attributes are represented on the Filters Panel and Selections Panel by toggle buttons that allow for quick searching and access to any combination of attributes.

 

The name provided to each HDRI file can also tell you what lighting attributes a given file contains. The following list explains how to break down the filenames into lighting attributes. This can be useful when manually editing a Render Scene Environment in TurboCAD. For example, you can change the file TurboCAD accesses for a certain position on a Cubical Map simply by changing a character of the file name in the Render Scene Environment Editor.

 

We'll use OCTA-0-0-0 as an example to explain this naming convention. Note the example filename excludes the OpenEXR file extension (.exr).

 

1. [ OCTA ]-0-0-0	The first four letters of the filename are taken from the name of the light style used in the image. The available light styles are: [ OCTA ]  Octagonal Softbox [ RECT ]  Rectangular Softbox [ SQUA ]  Square Softbox [ STRI ]  Strip (Narrow) Softbox [ UMBR ]  Umbrella (Diffuse) [ LBOX ]  Light Box
2. OCTA-[ 0 ]-0-0	This number represents the light configuration used in the HDRI file. The available configurations are: [ 0 ]  Single [ 1 ]  Double Horizontal [ 2 ]  Double Vertical [ 3 ]  Triple Horizontal [ 4 ]  Triple Diagonal [ 5 ]  Array
3. OCTA-0-[ 0 ]-0	This number represents the tone of the light sources in the HDRI file the available tones are: [ 0 ]  Cool (Temperature) [ 1 ]  Neutral (Temperature) [ 2 ]  Warm (Temperature) [ 3 ]  Sepia (Gel Tone) [ 4 ]  Soft Green (Gel Tone) [ 5 ]  Sunset (Gel Tone)
4. OCTA-0-0-[ 0 ]	This number represents the exposure value offset of the light sources in the HDRI file. The four available values are: [ 0 ]  -0 EV [ 1 ]  -1 EV [ 2 ]  -2 EV [ 3 ]  -3 EV When setting up your cubical maps, the brightest light sources will be those with a -0 EV setting. These are designed to be used as primary lighting sources. The remaining values will provide less light to a rendered scene by -1 EV steps. These are best used as secondary lighting and fill.