VectorBlur2

VectorBlur: motion blur along motion vectors — every pixel is smeared along its u / v vector (uv channels) times motion amount (0.5), over the shutter set by motion offset (-0.5 centres it).

VectorBlur: motion blur along motion vectors — every pixel is smeared along its u / v vector (uv channels) times motion amount (0.5), over the shutter set by motion offset (-0.5 centres it). Uniform or gaussian blur type; motion falloff (0.33) softens the ends. The vectors can be offset, inverted, un-premultiplied (uv alpha) or blurred first. Output uvs shows the prepared vectors. Use it after AIVectorGenerator, MotionBlur2D or a render with motion vectors.

Node	VectorBlur2
Menu	Filter › VectorBlur2
Names in each format
.oink comp (JSON)	`"type": "OC_N_vectorblur2"`
.nk script	`VectorBlur2` (how .nk import works)
Python	`nuke.createNode("VectorBlur2")`
Assistant (MCP)	`create_node(type="VectorBlur2")`
Tab search	`vectorblur2`, or its initials `vb2`

VectorBlur2 properties

Inputs and outputs

Port	Name	Type
input 0	Source	image
input 1	mask	image
output 0	Image	image

Knobs

Panel tab VectorBlur, in panel order.

Knob	Label	Type	Default	Range / values	.nk knob	Description
`channels`	channels	menu	`rgba`	rgba, rgb, alpha, all, none		Layer the op applies to: rgb, rgba, alpha, all, none, <layer> or <layer>.<ch>
`useGPUIfAvailable`	Use GPU if available	bool	`true`		`useGPUIfAvailable`
`uv`	uv channels	text	`none`		`uv`	Layer holding the u, v vectors (px per frame), e.g. motion / forward
`mv_presets`	mv presets	menu	`Nuke ScanlineRender`	Nuke ScanlineRender, PRMan, V-Ray Velocity Clamped, V-Ray Velocity, Arnold	`mv_presets`
`output`	output	menu	`result`	result, uvs	`output`
`blur_uv`	blur uv	menu	`none`	none, uniform, linear	`blur_uv`
`invert_uv`	invert uv	bool	`false`		`invert_uv`
`uv_offset`	uv offset	float	`0`	-1 to 1	`uv_offset`
`uv_alpha`	uv alpha	text	`none`		`alpha`	The channel premultiplied vectors were multiplied by (none = off)
`blur_type`	blur type	menu	`gaussian`	uniform, gaussian	`blur_type`
`scale`	motion amount	float	`0.5`	0 to 4	`scale`
`motion_falloff`	motion falloff	float	`0.33`	0 to 1	`motion_falloff`
`offset`	motion offset	float	`-0.5`	-1 to 1	`offset`
`grow_bbox`	expand blur bbox	float	`0`	0 to 500 (integer)	`grow_bbox`
`soft_lines`	soft lines	bool	`false`		`soft_lines`
`blur_inside`	blur inside	bool	`true`		`blur_inside`
`normalize`	normalize	bool	`true`		`normalize`
`mask_channel`	mask	menu	`none`	none, rgba.alpha, rgba.red, rgba.green, rgba.blue		Mask channel, e.g. rgba.alpha (none = no mask)
`inject`	inject	bool	`false`			Copy the mask into mask.a for nodes downstream
`invert_mask`	invert	bool	`false`		`invert_mask`
`fringe`	fringe	bool	`false`			Only apply the effect at the edges of the mask
`mix`	mix	float	`1`	0 to 1	`mix`

Other knobs (Python, .nk and the assistant; not on the panel)

Knob	Label	Type	Default	Range / values	Description
`gl_color`	Viewer Controls Color	float ×3	`0, 0, 0`	0 to 1
`postage_stamp_frame`	Static Frame	int	`1`	-2147483648 to 2147483647
`lifetimeStart`	Lifetime Start	int	`0`	-2147483648 to 2147483647
`lifetimeEnd`	Lifetime End	int	`100`	-2147483648 to 2147483647
`useLifetime`	Use Lifetime	boolean	`false`
`cached`	Cached	boolean	`false`
`bookmark`	Bookmark	boolean	`false`
`dope_sheet`	Dope Sheet	boolean	`false`
`clone_group`	Clone Group	string
`link_source`	Link Source	string
`link_overrides`	Link Overrides	string
`split_views`	Split Views	string
`unpremult`	(Un)premult by	enum	`none`	none, rgba.alpha
`invert_unpremult`	invert	boolean	`false`		(Un)premultiply by 1 - alpha
`v_up`	V Up (Nuke)	boolean	`true`

Knob names in .nk scripts

.nk knob	Knob here
`alpha`	`uv_alpha`

Other .nk knobs use the same name here. See .nk import.

VectorBlur2

Inputs and outputsCopy Anchor Link

KnobsCopy Anchor Link

Other knobs (Python, .nk and the assistant; not on the panel)Copy Anchor Link

Knob names in .nk scriptsCopy Anchor Link

On this page

Inputs and outputs

Knobs

Other knobs (Python, .nk and the assistant; not on the panel)

Knob names in .nk scripts