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You can access the Camera Imager Settings from the Camera tab in the Render Setup window, or from the Modify panel if you added an OctaneRender® Camera to the scene.
Figure 1: Accessing the Camera Imager settings from the Render Setup window
The Modify panel for Octane Camera and Universal Camera have similar Imager settings.
Figure 2: Camera Imager settings from the Modify panel.
Current Tone MappingRefers to applying a curve to an image to reduce dynamic range - Display the dynamic range settings used for the viewport and renderer.
Tonemap Interval - Maximum interval between tonemapping operations (in seconds).
Exposure - Controls the scene's exposure. Low values create a dark scene, while high values brighten the scene. Exposure has no effect on any of the render layer passes.
Highlight Compression - Reduces burned out highlights by compressing them and reducing their contrast.
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. - Adjusts the render's gamma and controls the image's overall brightness.
Vignetting - Darkens the corners of the render, which increases the render's realism. OctaneRender® doesn't apply vignetting to any of the beauty passes except the main pass.
Saturation To White - Creates multicolored reflections when the sun is too bright. Increasing this value changes the colors to white. This is also applicable to all sources of light.
Saturation - Adjusts the amount of color saturation for the render.
Hot Pixel Removal - Removes bright pixels (known as fireflies) during the rendering process. Many pixels can disappear if the render progresses, so this feature removes the bright pixels at a much lower sample per pixel.
Minimum Display Samples - The minimum amount of samples that OctaneRender® calculates before displaying the image. This feature reduces the noise when navigating, and it's useful for real-time walkthroughs. When using multiple GPUs, we recommend setting this value as a multiple of the number of available GPUs for rendering - if you’re rendering with four GPUs, set this value to 4 or 8.
White Balance - Specify the color to adjust the tint for producing and simulating the relative temperature cast throughout the image by different light sources. The white point is white by default.
Dithering - Adds random noise, which removes banding in very clean images.
Pre-Multiplied Alpha - Multiplies any transparency value of the output pixel by the pixel color.
Disable Partial Alpha - Makes semi-transparent pixels opaque (where the Alpha is greater than 0).
Neutral Response - The camera response curve doesn't tint the render result.
Response - Select the use of measured camera response curves, which provides various pre-defined color grades to a rendering.
Figure 2: Listing the various types of response curves available in OctaneRender®
Order - Determines the order that OctaneRender®applies the Response, Gamma, and Custom LUT (Custom Look Up Table) to the scene. 3D LUTs are defined for sRGB input values - you should apply the custom LUT last, but if there are 3D LUTs for linear input data, then apply the Custom LUT first.
Custom LUT - Choose a custom LUT.
LUT Strength - Controls the influence of the LUT.
OCIO View - OCIO View to use when displaying in the Render Viewport. OCIO Config file is set in Octane preferences.
OCIO Look - OCIO Look to apply when displaying in the Render Viewport, if using an OCIO view. OCIO Config file is set in Octane preferences.
Force Tone Mapping - Whether to apply Octane's built-in tone mapping (before applying any OCIO look(s)) when using an OCIO view. This may produce undesirable results due to an intermediate reduction to the sRGB color space.
Enable Denoising - Enables the spectral AI denoiser. This applies denoise to some beauty passes, including the main beauty pass, and writes the outputs into separate denoiser render passes.
Denoise Volumes - The spectral AI denoiser denoises Volumes in the scene.
Denoise On Completion - The beauty pass denoises once at the end of a render. Disable this option while rendering with the Interactive Region tool.
Min. Denoiser Samples - The minimum number of samples taken per pixel before the denoiser begins processing.
Max. Denoiser Interval - The maximum interval between denoiser runs (in seconds).
Blend - Accepts a value between 0 and 1 to blend the original image with the denoised results. A value of 0 results in a total denoised image, and a value of 1 results in an image without any denoising.
Sampling Mode - Selects the upsampler mode for rendering. The image renders at a lower resolution divided by the sampling mode, then it upscales to the final resolution.
Enable AI Up-Sampling - When you have an Upsampler Mode selection made and you enable this option, the render scales by using AI upsampling. Otherwise, scaling is done using traditional methods.
Up-Sampling on Completion - Beauty passes upsample once at the end of a render.
Min/Max U.S. Samples - The minimum and maximum number of samples per pixel until the upsampler activates. This parameter does not apply if you select No Upsampling in Upsampler Mode.
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