RayRender (Beta)

An optional camera input. The scene is rendered from the perspective of this camera. If the camera input is not connected, RayRender uses a default camera positioned at the origin and facing in the negative Z direction.

Either:

• A Scene node that is connected to the objects and lights you want to render, or

• a 3D object or MergeGeo node.

Select the filtering algorithm to use when remapping pixels from their original positions to new positions. This allows you to avoid problems with image quality, particularly in high contrast areas of the frame (where highly aliased, or jaggy, edges may appear if pixels are not filtered and retain their original values).

• Impulse - remapped pixels carry their original values.

• Cubic - remapped pixels receive some smoothing.

• Keys - remapped pixels receive some smoothing, plus minor sharpening (as shown by the negative -y portions of the curve).

• Simon - remapped pixels receive some smoothing, plus medium sharpening (as shown by the negative -y portions of the curve).

• Rifman - remapped pixels receive some smoothing, plus significant sharpening (as shown by the negative -y portions of the curve).

• Mitchell - remapped pixels receive some smoothing, plus blurring to hide pixelation.

• Parzen - remapped pixels receive the greatest smoothing of all filters.

• Notch - remapped pixels receive flat smoothing (which tends to hide moire patterns).

• Lanczos4, Lanczos6, and Sinc4 - remapped pixels receive sharpening which can be useful for scaling down. Lanczos4 provides the least sharpening and Sinc4 the most.

The projection modes are:

• perspective - have the camera’s focal length and aperture define the illusion of depth for the objects in front of the camera.

• orthographic - use orthographic projection (projection onto the projection plane using parallel rays).

• spherical - have the entire 360-degree world rendered as a spherical map. You can increase tessellation max to increase the accuracy of object edges as they are warped out of line, but this takes longer to render.

• render camera - use the projection type of the render camera.

Sets the number of samples, per pixel, to use in stochastic estimation (zero is disabled). Lower values result in faster renders, while higher values improve the quality of the final image.

Stochastic sampling is based on Robert L. Cook’s Stochastic Sampling in Computer Graphics, available in ACM Transactions on Graphics, Volume 6, Number 1, January 1996.

NOTE:  It is recommended for motion blur that the samples control is adjusted. This also provides anti-aliasing by jittering the sample point.

Sets the error threshold for the triangle ray intersection calculations.

When enabled, interpolate between animation keyframes during the shutter aperture.

When disabled, no interpolation is calculated.

Enabling interpolation can decrease the number of keyframes and stocastic samples required to produce motion blur, but may introduce deviation from the motion direction.

Sets the number of keyframes used to reconstruct motion blur during the shutter aperture.

When enabled, use a uniform temporal distribution of scenes to sample. This generates more accurate results for stochastic multisampling.

Enter the number of frames the shutter stays open when motion blurring. For example, a value of 0.5 corresponds to half a frame.

This value controls how the shutter behaves with respect to the current frame value. It has four options:

• centred - center the shutter around the current frame. For example, if you set the shutter value to 1 and your current frame is 30, the shutter stays open from frame 29,5 to 30,5.

• start - open the shutter at the current frame. For example, if you set the shutter value to 1 and your current frame is 30, the shutter stays open from frame 30 to 31.

• end - close the shutter at the current frame. For example, if you set the shutter value to 1 and your current frame is 30, the shutter stays open from frame 29 to 30.

• custom - open the shutter at the time you specify. In the field next to the dropdown menu, enter a value (in frames) you want to add to the current frame. To open the shutter before the current frame, enter a negative value. For example, a value of - 0.5 would open the shutter half a frame before the current frame.

If the shutter offset parameter is set to custom, this parameter is used to set the time that the shutter opens by adding it to the current frame. Values are in frames, so -0.5 would open the shutter half a frame before the current frame.

When enabled, assume a sample value of 1 and a shutter offset of 0, unless a custom shutter offset is in use.

When disabled, set the required sample value.

When enabled, RayRender passes all the arbitrary output variables listed into the specified channels.

When output vectors is enabled, these dropdowns allow you to split out the various AoVs into specific channels for use later on in the node tree.