Octane Imager attributes can be accessed in a Camera's Shape node under the Octane Camera rollout. Figure 1 shows the Octane Imager settings in the Attribute Editor.
Figure 1: The Octane Imager settings in the Attribute Editor
Octane Imager Parameters
Controls the exposure of the scene. Smaller values will create a dark scene while higher values will brighten the scene. Note also that exposure has no effect on any of the render layer passes.
Adjusts the luminance values of the rendered image
A list of preset measured camera response curves which can can be selected to provide various predefined color grades to a rendering. To disable color grading choose the Linear/Off option at the bottom of the list.
If enabled, the camera response curve does not tint the render result.
Adjusting this parameter increases the amount of darkening in the corners of the render. Used sparingly, it can greatly increase the realism of the render. Note also that vignette is not applied to any of the beauty passes except the main pass.
Adjusts the amount of color saturation for the render.
Hot Pixel Removal
Is used to remove the bright pixels (fireflies) during the rendering process. While many of the pixels can disappear if the render is allowed to progress, the Hot Pixel Removal feature allows the bright pixels to be removed at a much lower Sample per Pixel.
Enabling this option multiplies any transparency value of the output pixel by the pixel color.
Minimum Display Samples
Is the minimum amount of samples that are calculated before the image is displayed. This feature can significantly reduce the noise when navigating and is useful for real-time walkthroughs. When using multiple GPUs, it’s recommended to set this value as a multiple of the number of available GPUs for rendering, e.g. if you’re rendering with 4 GPUs, set this value at 4 or 8.
Adds random noise which removes banding in very clean images.
When the sun is too bright, it can create multicolored reflections. Increasing this value will change the colors to white. This is also applicable to all sources of light. Fully saturated parts of the render can be pushed towards pure white with this option. This helps avoid large patches of fully saturated colors caused by over-bright light sources such as very bright colored emitters or reflected sunlight off colored surfaces.
Allows users to specify the color used to adjust the tint to produce and simulate the relative temperature cast throughout the image by different light sources. The white point is white by default.
Maximum Tonemap Interval
Maximum interval between tonemaps in seconds
Reduces burned out highlights by compressing them and reducing their contrast.