My guess is that you have not enabled “Affect Alpha” in the 3ds Max lens effects global scene settings. As a result, the lens glow is visible in the RGB channels, but the alpha channel contains no transparency information for it. When you import it into After Effects, since the alpha channel includes the object but not the glow, the glow is getting cut off.
Your best option may be to re-render with the lens effect’s Affect Alpha on in 3ds Max; alternately, in AE, you could select the PNG file in the project panel, right-click, and choose Interpret footage. Change the alpha interpretation to ignore. If my hunch above is correct, you’ll get your blur back, but you’ll lose all transparency.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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