Register  |  FAQ  |  Search  |  Memberlist  |  Usergroups  |  Log in 
Reply to topic
 Chromatic Abberation possible with DOF Gen Pro? 
rad_thundercat


Joined: 27 May 2008
Posts: 3
Location: Boca Raton, FL
Reply with quote
Hi,

I'm wondering if its possible to get this effect with DOF Gen pro. -It's the blurry look that occurs any time light refracts from a lens at the edges of high contrast areas.

I would assume the program does support it with the "Edges" function (under Depth), but I can never get it to produce the effect. Even when I have a depth map loaded, and I can see the edges using 'edges | view', I get nothing. Am I missing something? Can someone post and image of this effect with DOF Gen Pro?

Thanks!

_________________
SilkyPixel: 3D Techniques & Annoyances
View user's profile Send private message Visit poster's website
  
richardrosenman
Site Admin

Joined: 23 Oct 2005
Posts: 145
Location: Canada
Reply with quote
Can you post a a specific example of the effect. I know we have some new features in the forthcoming release but they often have different names so I'll know by a visual reference.

-Richard

_________________
Richard Rosenman
DOF PRO Developer
Digital Animation Director
http://www.dofpro.com
http://www.mblpro.com
http://www.cgsphere.com
http://www.hatchstudios.net
http://www.lumierefilter.com
http://www.richardrosenman.com
View user's profile Send private message Visit poster's website
  
rad_thundercat


Joined: 27 May 2008
Posts: 3
Location: Boca Raton, FL
Reply with quote



Here is the wiki page: http://en.wikipedia.org/wiki/Chromatic_aberration.

By the way, great program Richard. It has been a pleasure to work with.

_________________
SilkyPixel: 3D Techniques & Annoyances
View user's profile Send private message Visit poster's website
  
richardrosenman
Site Admin

Joined: 23 Oct 2005
Posts: 145
Location: Canada
Reply with quote
Hi Rad;

Thanks for the example. The edges features in DOF PRO is used to reduce incorrect DOF results due to anti-aliased edges. By using the edges feature, you can effectively select anti-aliased edges of your image, and remove the smoothness thus applying a proper DOF effect. You can then soften the aliased edges by applying a minimal blur to those sections only.

So this is something different from what you're talking about.

I was checking out the examples and I can see that chromatic abberation describes the visibility of various colors of the light spectrum in high contrast areas. This makes sense to me in motion blur aspects but I still don't particularly understand how it can relate to DOF images. The Purple Fringing aspect described in the chromatic abberation is clearly visible and actually, doesn't look like a tough feature to implement. Do you think it's possible to source some examples of chromatic abberation in DOF images for me?

Also, I can't see it in the 3D ring's image you posted. Can you describe to me where it is seen? Clearly, there's lots of reflective caustics and such but I think you're describing something else.

I'll take a closer look at the purple fringing in the meantime.

-Richard

_________________
Richard Rosenman
DOF PRO Developer
Digital Animation Director
http://www.dofpro.com
http://www.mblpro.com
http://www.cgsphere.com
http://www.hatchstudios.net
http://www.lumierefilter.com
http://www.richardrosenman.com
View user's profile Send private message Visit poster's website
  
rad_thundercat


Joined: 27 May 2008
Posts: 3
Location: Boca Raton, FL
Reply with quote
Ah, yes I completely missed what the 'edges' feature accomplishes.

From a technical point of view, I don't know how chromatic aberration relates to DOF if it does at all. However, looking at it from a post-production lens phenomena stance, it seems like it would go along well with the noise filter and bokeh effects. I could see it trigger from the 'highlights' dialog when the enhance controller hits a certain threshold.

I found some good reference shots. I ran into a lot more 'purple fringing' (sometimes its green) than all out full-spectrum aberrations.






Regarding the render of the coins and rings; the effect is very subtle, but it's there. Look at the edges of round pedestal that the rings and coins are on (not referring to the caustics, btw).

Thanks for your time on this!

_________________
SilkyPixel: 3D Techniques & Annoyances
View user's profile Send private message Visit poster's website
  
richardrosenman
Site Admin

Joined: 23 Oct 2005
Posts: 145
Location: Canada
Reply with quote
Hey Rad;

Thanks for all the info - let me see what I can do...

-Richard

_________________
Richard Rosenman
DOF PRO Developer
Digital Animation Director
http://www.dofpro.com
http://www.mblpro.com
http://www.cgsphere.com
http://www.hatchstudios.net
http://www.lumierefilter.com
http://www.richardrosenman.com
View user's profile Send private message Visit poster's website
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
All times are GMT - 4 Hours  
Page 1 of 1  

  
  
 Reply to topic