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The Camera Imager parameters are accessed via the Octane Camera Tag (figure 1).
Figure 1: The Octane Camera Imager settings.
Enable Camera Imager
Actives the Camera Imager effects.
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.
This reduces burned out highlights by compressing them and reducing their contrast.
This parameter determines the order for Response, 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., and LUT. It defines the order in which the Response curve, the Gamma and the Custom LUT is applied on the scene. Typically, 3D LUTs are defined for sRGB input values, i.e. you usually want to apply the custom LUT last, but there might also be 3D look-up tables for linear input data in which case you might want to apply the custom LUT first.
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 doesn't tint the render result.
Adjusts the luminance values of the rendered image.
This parameter allows for a custom Look Up Table to be used.
This 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.
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
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.
Checking the Pre-multiplied Alpha button multiplies any transparency value of the output pixel by the pixel color.
Disable Partial Alpha
Option to make pixels that are partially transparent (alpha > 0) fully opaque.
Adds random noise which removes banding in very clean images.
Saturation To White
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.
Minimum Display Samples
This 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.
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