Refracting into a photograph
Posted: Tue Mar 10, 2009 12:43 am
Suppose I want to insert a photo of a person into a Maxwell environment...
or lets say I want a blurry shallow DOF object rendered in front of the photo.
If I map the photo onto a card, won't the card get lit, which will alter and darken the photo? The photo is already the way I want it.
Here is my roundabout solution:
1) Render the lit room with the 'billboard' object set to Lambert white. (a/k/a bright gray, no specular component.)
2) DIVIDE the photo by the lighting on the card using the After Effects plugin 'unmult' or by using a Maya shader that invokes the arithmetic 'divide' node. -- further detail
3) Take the newly processed extra bright, inversely-lit photo and map it back into the original Maxwell scene, where the lighting should now have the effect of making it look unlit.
... am I making too much of this?
or lets say I want a blurry shallow DOF object rendered in front of the photo.
If I map the photo onto a card, won't the card get lit, which will alter and darken the photo? The photo is already the way I want it.
Here is my roundabout solution:
1) Render the lit room with the 'billboard' object set to Lambert white. (a/k/a bright gray, no specular component.)
2) DIVIDE the photo by the lighting on the card using the After Effects plugin 'unmult' or by using a Maya shader that invokes the arithmetic 'divide' node. -- further detail
3) Take the newly processed extra bright, inversely-lit photo and map it back into the original Maxwell scene, where the lighting should now have the effect of making it look unlit.
... am I making too much of this?