These buttons are used to select the filter used for applying the blur.

This applies a depth based box blur effect to the image.

This applies a depth based general softening filter effect.

This applies a depth based high quality softening filter effect.

Select one of these options to determine the channel used to control the level of blur applied to each pixel. The channel from the main image input is used, unless a tool is connected to the tool's Blur Image input on the flow.

When toggled on, this control locks the X and Y blur sliders together for symmetrical blurring.

This slider is used to set the strength of the horizontal and vertical blurring applied to the image.

This control is only visible when the Blur channel is set to use the Z Buffer.

Use this control to select the distance of the simulated point of focus. Lowering the value causes the Focal Point to be closer to the camera, raising the value causes the focal point to be further away.

Click-drag the Pick button (the pointer changes to a dropper) over the displayed image and select a Z-buffer value. If the image does not contain a valid Z-buffer, no change will occur in the value.

This control is used to determine the depth of the area in focus. The focal point is positioned in the middle of the region and all pixels with a Z-value within the region stay in focus. For example, if the focal point was selected from the image and set to a value of 300, and the depth of field is set to 200, any pixel with a Z-value between 200 and 400 would remain in focus.

Scales the Z-buffer values by the selected amount. Raising the value causes the distances in the Z channel to expand. Lowering the value causes it to contract. This is useful for exaggerating the depth effect. It can also be used to soften the boundaries of the blur. Some images with small depth values may require the Z Scale to be set quite low, below 1.0.