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

Either:

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

• a 3D object or prim.

When to enable random jittering in time.

The default value is 2, which means jittering to produce motion blur occurs when samples are at a value 2 or higher. If samples are at 1, no motion blur will be created, but motion vectors will be produced so that you can still blur the image.

Shifts the time frame of input geometry, lights and cameras while keeping the renderer at the same output frame.

This means you can slip your render in time (with subframe accuracy) without affecting the camera or the objects in the stage, which can be really helpful when you are trying to slip the camera to get vector motion blur aligned properly.

The preset projection modes are:

• Render Camera - Take the projection mode from the camera.

• 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.

• Cylindrical - have the 360-degree world horizontally cylindrically projected around a camera.

• UV Unwrap - have every object render its UV space into the output format. You can use this option to cook out texture maps

Select when the shutter opens and closes in relation to the current frame value when motion blurring:

• centered - to 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 - to 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 - to 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 - to 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.

Nuke has always defaulted to start and going forward in time, so at a given frame the shutter is open. However often it can be useful to change this to end when you want a motion blur trail to an impact point on a specific frame.

When the bg input has a larger pixel box than its format size, defines how the render should handle the entended bbox area outside the format’s size.

Format - render region is the format size, and any extended bbbox pixels are passed through unchanged.

Format Extend - render region is the format size, and automatically expanded to fill ant extended bbox area.

Format Clip - render region is the format size, and the output bbox is clipped to the format.

Enable or disable the motion blur of a camera being transformed i.e. animating a Camera through space.

Please note that subsampling matrices produce artifacts currently, as this requires quaternions for the matrix interpolation method which has not yet been implemented. As a workaround increase the Shutter Segments to chop up the frame you are generating the matrix for, into multiple matrices.

Defines the maximum depth rays can ‘bounce’ to, allowing you to balance render performance and quality. Ray max depth is tested and incremented for all ray types, so the max depth can be a mix of ray types. For example, if the max depth is 4 then a ray bounce sequence like:

ray# type

1 camera

2 glossy

3 glossy

4 diffuse

5 refraction

will stop at the ‘diffuse’ ray bounce which is ray #4 in the sequence. However, if glossy max depth was set to only 1 then shading would stop at ray #2 terminating the sequence.

The higher the number the more 'accurate' the render is, but at the cost of render time.

List of material family names that the renderer will attempt to use for material connections, in search order priority.

Default is ‘slr mtlx’ where ‘slr‘ is the native material family for ScanlineRender and ‘mtlx‘ is the MaterialX material family. If a material provides multiple output connections then they are matched in the order of the family list (ie ‘slr‘ first, then ‘mtlx’.) If no match is made then the material binding fails and the object will not be rendered.

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.

Controls whether or not lights in the scene affect the 2D output.

auto: renders with surface lighting when there are lights in the scene, or constant shading if no lights

on: renders with surface lighting, but if no lights surfaces will appear black if not emissive

off: renders constant shading, ignoring lights

Enter a value between 0 (black) and 1 (white) to change the global ambient color.

If you set ‘Ambient’ to 1.0 with a scene with no lights, the surfaces will emit their diffuse color as if illuminated equally from all directions.

Filter input scene prims by their purpose attribute.

all: renders all prims regardless of purpose default: renders prims based on default settings for the stage

render: renders all prims set to render purpose

proxy: renders all prims set to proxy purpose

guide: renders all prims set to guide purpose

all disables purpose filtering so everything renders, and if none are enabled then nothing will be rendered.

Specifies the mask pattern to match prim names to include in the output scene, excluding light prims such as DirectLight1.

The default mask, //*, includes everything from the root of the scene graph. As you can see, you can use standard glob-style variables, such as /*, to create masks or use individual prim names separated by spaces. For example, /GeoCube1 /GeoCard3 includes only those prims in the output scene.

Tip:  You can also use the cog menu, the Viewer picker, or drag and drop paths from the Scene Graph to create masks.

Specifies the mask pattern to match light names to include in the output scene, excluding object prims such as GeoCube1.

The default mask, //*, includes everything from the root of the scene graph. As you can see, you can use standard glob-style variables, such as /*, to create masks or use individual prim names separated by spaces. For example, /DirectLight1 /PointLight4 includes only those light prims in the output scene.

Tip:  You can also use the cog menu, the Viewer picker, or drag and drop paths from the Scene Graph to create masks.

On: Output classic style Nuke Z is which 1/Z-distance. ‘No Object’ is black 0.0 and the Z value *decreases* the further from camera. Note that 1/Z is NOT normalized Z. 1/Z is easily converted back to absolute Z-distance by using another 1/Z.

Off: Output absolute Z-distance where ‘No-Object’ = inf and the Z value increases the further from the camera. This is the world-space distance from the camera to the object.

Select how to render motion vectors:

Off: don't create any motion vectors

Distance: stores the distance between the samples in the motion vector channel

Distance Normalized: normalized distance between the samples in the motion vector channel

Velocity: stores the velocity in the motion vector channel

Velocity Normalized: normalized velocity in the motion vector channel

Source of Aov from shading results. A list of shading variable layers extended if geometry prims provide primvars. For example if a geometry mesh object provides a primvar named ‘myUV‘ then it will appear at the end of this list along with its size (float, vec2, vec3, vec4.

Predefined shading attributes:

Cf- Geometry color (from primvar if available)

Co - Geometry opacity (from primvar if available)

presence - Surface presence (physical solidity)

Oi - Surface rgb opacity (optical transparency)

Zlinear - U near-projected distance (classic Z)

Zdistance - Camera ray distance

Ps - Shading position

Pg - Geometric position

Ns - Shading normal

Ng - Geometric normal

Ts - Shading tangent

UV- Surface parametric-uv coordinate (from primvar if available)

UVW - Surface parametric-w (Z for volumes, from primvar if available)

St - Texture coordinate (different than parametric-UV if modified by shader)

MotionFwd - Forward motion-vectors

MotionBwd - Backwards motion-vectors

Math to use when merging multiple surface samples in depth:

• premult-blend - Premult A then Under(B + A*Aa*(1-Ba)) or Over(B*(l-Aa) + A*Aa) - best for data Aovs

• blend - Under(B + A*(1-Ba)) or Over(B*(l-Aa) + A) - best for color Aovs

• plus -B+A

• min - min (B, A) - best for Z

• mid -(B+ A)/2

• max - max(B, A)

When enabled, deep samples with an alpha value of 0 do not contribute to the output.

When disabled, deep samples with an alpha value 0 contribute to the output.

• With the Integrator knob set to Default, ScanlineRender will render utilising the new ray tracing architecture and act as a standard utility renderer. You can use the options to the right to Reverse Order, switch to rendering in Uv Mode, or simply only output the render without the background input using Render only mode.

• If you switch the Integrator knob to Debug mode, it gives you access to rendering your scene in different shading contexts, such as normals and texture coordinates.

• The final Integrator option available is Occlusion which can switch between ‘Ambient’, ‘Reflection’ and ‘Refraction’ modes to give you even more ways to render your scene.

Note:  Debug and Occlusion modes are experimental options and currently not fully functional.