Copy link to clipboard
Copied
HI,
I have motion tracked a clip using 3D Camera Tracker. I created text and extruded it and added several lights and a shadow catcher. My problem is that I'm using a parallel light to simulate sunlight and produce the appropriate shadow. I want to diffuse the shadow, but I don't seem to get that option with a parallel light. I've tried adjusting the Ray-tracing Quality Setting, but it made no difference. I also tried adjusting the AntiAliasing, but still no difference. Does anyone have any ideas how I can diffuse the shadow for a parallel light?
It is possible, it's just a lot of work.
Copy link to clipboard
Copied
I wouldn't use parallel light. I'd use a normal spotlight, but back it way, way up from the subject.
Copy link to clipboard
Copied
It's not possible with AE's parallel lights. as suggested, simply use a spot light. Otherwise shadows often can be faked using layer duplicates, but without knowing anything about your comp nobody can advise specifically.
Mylenium
Copy link to clipboard
Copied
It is possible, it's just a lot of work.
The second option is to add a point or a spot light and adjust the light....
Here's a project file for you to play with: Dropbox - softShadowParalellLight.aep (note: your browser may add a .txt extension to the file when it is downloaded. Just delete it and things should work just fine)
Copy link to clipboard
Copied
Hey Guys,
Thanks so much for weighing in on this question. I find the limitations of After Effects CC 2017, on this issue, a bit frustrating. Maybe there will be some improvements soon. I appreciate your responses and suggestions.
Rick, as usual, you've gone the extra mile. I appreciate the extra time and effort you used in helping me out with my question. The inclusion of a sample .aep has also been very helpful.
Again, thanks to everyone!!
Jorge
Copy link to clipboard
Copied
Maybe there will be some improvements soon.
Unless AE switches to a full native raytracer (not that RRaytrace 3D or Cinema 4D nonsense) that is unlikely. Something to to with randomizing sample positions and the emission origin.
Mylenium
Copy link to clipboard
Copied
In the real world the sun gives parallel light and the edges of the shadows are hard. That's the way it works in nature and in AE and it makes perfect sense. I'm not sure why you would want to create soft shadows from parallel light when it's so easy to create natural looking diffused shadows using a spot light or a point light.
My explanation was more an exercise in compositing using AE's 3D space and track mattes. The techniques I demonstrated can be used for far more than just faking a diffuse shadow.
You also would want to be adding some ambient light whenever you are working with shadows and you need to pay attention to the falloff distance and type. There's a lot to learn.
Copy link to clipboard
Copied
Rick GerardIn the real world the sun gives parallel light and the edges of the shadows are hard. That's the way it works in nature
Not at all. It's merely a simplification going back to the olden days of computer graphics. I'm gonna spare you a detailed explanation from my POV as a physics buff...
Mylenium