Creating Glow Effects With BCC

• Drag the Glow Intensity parameter to the right, stopping at a value of 5.

Observe that the glow has not completely obliterated the image, but that it seems to stop at the threshold value. All pixels that are within the Threshold value are now pure white. This is clearly way too much for a simple glow effect over the image and we really don't even need to push this parameter value all the way to 5, the default setting of 1.0 provides a very nice looking glow for most image clips. What we can see from the results of manipulating the values in these two parameters that if we adjust both the Glow Threshold and the Glow Intensity parameters over time that we can use the BCC Glow as a transition effect, with the outgoing clip disappearing in a white glow and the incoming effect appearing out of the glow.

• Import the second clip into the AE project - this will become the incoming clip
• Drag the incoming clip into the AE timeline and position it in the second half of the timeline, with the clip head at the 2:15 mark and place it above the outgoing clip
• Apply the BCC Glow to the incoming clip

So we now have the BCC Glow filter effect applied to both the outgoing and the incoming clips. Next step is to animate both the Glow Threshold and the Glow Intensity parameters on both clips to generate the glow wipe transition. The outgoing clip will glow up to pure white and the incoming clip will glow down from pure white to normal. First we'll set up the outgoing clip.

• Set the CTI to the start of the timeline
• Disable the viewer for the incoming clip by clicking on the eyeball next to this track in the timeline
• Click on the outgoing clip to bring the BCC Glow filter parameters into the Effects Controls window
• Click on the stopwatch beside both the Glow Threshold and the Glow Intensity parameters (this action enables keyframing for these parameters)

• Set the value of the Glow Intensity to zero
• Set the value of the Glow Threshold to zero
• Move the CTI to the 1:15 mark in the timeline
• Set the Glow Threshold parameter to a value of 50
• Move the CTI to the 2:15 mark in the timeline
• Set the Glow Threshold parameter to a value of 0
• Set the Glow Intensity parameter to a value of 1.00
• Scrub the timeline to see the effect

Now we'll animate the effect on the incoming clip.

• Click on the eyeball next to the incoming clip to view this track in the comp
• Move the CTI to the middle of the comp, which is 2:15
• Click on the incoming clip to bring the BCC Glow filter parameters into the Effects Controls window
• Click on the stopwatch beside both the Glow Threshold and the Glow Intensity parameters (this action enables keyframing for these parameters)
• Set the value of the Glow Intensity to 1.2
• Set the value of the Glow Threshold to a value of 0
• Move the CTI to the 3:15 mark in the timeline
• Set the Glow Threshold parameter to a value of 50
• Move the CTI to the end of the timeline
• Set the Glow intensity to a value of 0
• Preview to RAM to see the completed effect

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