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Texture Image RGB

The RGB image imports external Texture maps to any material parameters that accept a Texture map. In Figure 1, a bitmap titled screws2Prnt.jpg connects to a MaterialThe representation of the surface or volume properties of an object.'s Bump attribute.

Figure 1: An object with an imported Texture map connected to the material’s Bump parameter

Figure 2: The node network for the material rendering from Figure 1 and the associated parameters

RGB Image Parameters

Power

Controls the image brightness. Lowering the value causes the image to appear darker on the surface.

Color Space

This menu was added to support the ACES color management system and sets the color space of the Image Texture:

• Non-Color Data — Use this option for data maps (such as Normal maps). Any map set to this value will use a gamma value of 1.0.
• sRGB — For any image using the sRGB color space. This option has a non-linear response curve applied, with a gamma of 2.2, per the definition of sRGB. Note that the gamma value is ignored with this setting as a result.
• Linear sRGB + Legacy GammaThe function or attribute used to code or decode luminance for common displays. The computer graphics industry has set a standard gamma setting of 2.2 making it the most common default for 3D modelling and rendering applications. — This is the default option, for backwards compatibility with previous versions of Octane. For true linear images, however, make sure that the gamma value is set to 1.0. Use this option if you wish to manually adjust the gamma value of your image.
• ACES2065-1 — The ACES archival color space (widest gamut).
• ACEScg — The ACEScg color space, which is a smaller gamut than ACES2065-1; if you have ACES images coming from outside sources, this may be the best option.

Legacy Gamma

Controls the image's luminance and can tune or color-correct the image but can only be used with the Linear sRGB+Legacy Gamma color space.

Invert

Inverts the image's color output values.

Linear sRGB Invert

This option is used to swap the order of gamma correction and image color conversion.

Border Mode

Sets the behavior of the space around the image if the image does not cover the entire geometry. The default behavior is Wraparound, which repeats the image in the areas outside of the image's coverage. If you set this to white or black, the area outside the image turns white or black, respectively.

Filename

The file path name of the image texture.

Reload

Should be activated if the file needs a reload or the preference of the image file has been changed.

Image Chosen Layer Name

Indicates the chosen layer name, if the current image has multiple layers.

IESAn IES light is the lighting information representing the real-world lighting values for specific light fixtures. For more information, visit http://www.ies.org/lighting/. Photometry Mode

Can be used to adjust the normalization of data from an IES file.

Channel Format

Determines the proper format of the imported IES profile texture.

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