Trying to produce realistic lens flairs from diamonds or glass is extremely difficult. The sample footage you pointed us to is a real ring that's nicely lit on a real turntable. Replicating that exact look is very difficult and requires many layers from many passes of your 3D model.
I'd try some volumetric lighting and ray tracing options in your 3D app first. Render to separate layers there rather than trying to jack things around in AE. You could render just a diffuse pass, a specular pass, a reflection pass, or even set up the diamonds to emit light and render just that. Now you would have the elements that you need in AE to enhance with Trapcode Glow. You'll get a better result than trying to jack around copies of your rendered footage and fix things with blend modes and color correction.
You might want to take a look at this tutorial on multi pass rendering for AE. It's written for C4D but the basics are all the same no matter what app you're using.
Your artifacts are probably caused by the extreme application of the curves filter. You're cramming 95% of the pixel data into a very small color space and you just asking for trouble.
Things that I can't tell about your project from your screenshot:
- Is it 32Bit? it should be.
- How many layers are you using?
- What does the composite look like in the Comp window with everything turned on. I'm assuming it looks like the rendered movie.
I wouldn't use SWF for anything but final output and then I'd probably embed an H264 movie in the flash project. I hope you're not using the SWF exporter in AE. That's only good for quick previews or simple web banners. You can make any movie look in AE and any quicktime can be made to loop on the net
I'd say your diamonds material is not correct. You never seem to achieve a total internal reflection in your example, hence there never are contiguous white surfaces. that's pretty much all you'd need. Ideally you'd simply render a separate material pass for the insides and use that to drive the glints...
Firstly I'd like to thank you for your time and help. The example is in fact CG; here is the link to the studio that made it:
The project was rendered in Keyshot which lights the scene using a single HDRI image. Keyshot 2 does not currently allow for multipass rendering. I can only render in two passes with this version (alpha and regular). The original images were rendered as jpegs, so they are not 32 bit. But I imported them into after effects and added blending modes and then re-rendered the que from After Effects in the png format and then compiled the swf file with Matrix's movie maker function. In After Effects I have 4 layers (1) the original render (2) the black and white render with the Trapcode filter applied and the blending mode set to multiply (3) a layer with a subtle vignette that was made in photoshop (4) The "Marks Jewelers" animated logo. (Ignore the watermark layer. I turned it off because it was distracting.)
When all the layers are turned on they look like the final composite.
I have rendered to other formats other than swf but I need to show this turntable looping to my boss seamlessly and in other formats the turntable seems to jitter or I get flashing when I loop the file in various media players. And I made sure the problem was not within my frames. The final video needs will be posted on the Jeweler's website so I am guessing the swif format will work for that.
The diamond material that I used is the standard default diamond material in Keyshot (so it has the correct IOR and should have accurate settings). I only tweeked the abbe number which controls how much color is reflected durring refractions. So my diamonds have a bit more color to them, but other than that the material should be physically accurate.
Thanks for the support fellas. I'm new to this type of work so all the comments are much appreciated. =)
<iframe frameborder="0" width="480" height="480" src="http://www.dailymotion.com/embed/video/xlcm9a_final-02_creation"></iframe><br /><a href="http://www.dailymotion.com/video/xlcm9a_final-02_creation" target="_blank">Final_02</a> <i>by <a href="http://www.dailymotion.com/Zander_Henkels" target="_blank">Zander_Henkels</a></i>
Other issues aside, gamma down your footage. It's totally blown out.
Your levels are way too high. You've got to try and maintain some detail in the whites. Solve that and we'll be able to see the simulated refraction in the diamonds a lot better.
thanks for the helps guys I'll work on lowering the gamma and making sure the blown out areas are gone.
For me, the major isssue is that you are rendering to JPEGs.
Render to OpenEXRs or HDR. You'll have a lot more control over exposure in post.
Also, you are working in 8-bpc color, which isn't great if you trying to realistically glow stuff. Shift it up to 32bpc.