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Glow looks fine in VisionLab, but VERY odd once rendered?

Posted: Thu, 14th Apr 2011, 9:15am

Post 1 of 6

Hikaru755

Force: 1000 | Joined: 19th Oct 2009 | Posts: 22

VisionLab User FXhome Movie Maker

Gold Member

Well, I just created a new intro for my YouTube Channel, and it looked very good in VisionLab. But every time I render it (no matter with which render options) the glow is very strange in the rendered file. It looks like this: http://twitpic.com/4kntpm
I think you can see what I mean and what it should look like... Again, in the Visionlab project it looks like it should!
I already guessed that it could have something to do with the Lens Flare effects, because the glow is only that strange in the frames where the Lens Flares are visible, but why? And how do I change that?
Thanks for all replies! smile
Posted: Thu, 14th Apr 2011, 2:31pm

Post 2 of 6

Axeman

Force: 17995 | Joined: 20th Jan 2002 | Posts: 6124

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker MacOS User

SuperUser

It looks like the software is retaining alpha channels when you render. In order for the glow to fade out, the color has to be solid, so the alpha can gradually fade out and the color still shows through. However, when you look at the rendered footage, the alpha isn't being displayed by whatever software you are using to view the footage. It should just be a matter of changing how your viewing software handles the alpha.
Posted: Thu, 14th Apr 2011, 2:49pm

Post 3 of 6

Hikaru755

Force: 1000 | Joined: 19th Oct 2009 | Posts: 22

VisionLab User FXhome Movie Maker

Gold Member

Axeman wrote:

It should just be a matter of changing how your viewing software handles the alpha.
Doesn't work. I have "Retain Alpha Channel" not checked, and as I said, the Glow looks perfect in the frames where the Lens Flares aren't visible... That's strange.
Posted: Thu, 14th Apr 2011, 3:16pm

Post 4 of 6

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker Windows User

FXhome Team Member

Try putting a black image behind everything on the lowest layer. I think this might be happening because you're compositing onto transparency, even if the exported file isn't including alpha.
Posted: Thu, 14th Apr 2011, 5:18pm

Post 5 of 6

EvansCinemas

Force: 1425 | Joined: 21st Feb 2008 | Posts: 37

VisionLab User FXhome Movie Maker

Gold Member

I have the exact same problem a lot of the time. Just put a black plane behind everything like Tarn said, and it will look just fine.
Posted: Thu, 14th Apr 2011, 7:41pm

Post 6 of 6

Hikaru755

Force: 1000 | Joined: 19th Oct 2009 | Posts: 22

VisionLab User FXhome Movie Maker

Gold Member

Ah, that solved the problem! Thanks so much! smile