07-29-2016, 03:29 AM
This is one of the best reads about light.
http://www.itchy-animation.co.uk/light.htm
Maybe try not to think about the shadow but what is lighting that particular surface.
Light will almost never come from a single point but from a full sphere around us.
On a given point on a given surface an hemisphere is launching photons to that single point.
or
Imagine you have a very litle camera wide angle fish lens 180, then place it on where you want to shade facing out. You will see a full scene throwing light at that little camera.
Yes the sun is a dot but you can never isolate its light. You will always have light bouncing everywhere, on the floor, on the wall, on the clouds, on the same object surface.
For example "occlusion" its just a little cave that its having that hemisphere being reduced so its get darker.
Technicaly the hemisphere is still there but the surface that wrapds that hemisphere its just darker.
Casted shadow just means the main strongest light is being cut but it will still be lighted by a bunch of things around.
The names cast, form, oclusion, terminator. In general refer to a single point of light wich is something impossible on itself.
They are there just so we can talk about and explain things but are abstractions.
Im sorry if a make anyone more confused. Its just my way of seeing it.
At least read that link if you havent already. Its the best.
http://www.itchy-animation.co.uk/light.htm
http://www.itchy-animation.co.uk/light.htm
Maybe try not to think about the shadow but what is lighting that particular surface.
Light will almost never come from a single point but from a full sphere around us.
On a given point on a given surface an hemisphere is launching photons to that single point.
or
Imagine you have a very litle camera wide angle fish lens 180, then place it on where you want to shade facing out. You will see a full scene throwing light at that little camera.
Yes the sun is a dot but you can never isolate its light. You will always have light bouncing everywhere, on the floor, on the wall, on the clouds, on the same object surface.
For example "occlusion" its just a little cave that its having that hemisphere being reduced so its get darker.
Technicaly the hemisphere is still there but the surface that wrapds that hemisphere its just darker.
Casted shadow just means the main strongest light is being cut but it will still be lighted by a bunch of things around.
The names cast, form, oclusion, terminator. In general refer to a single point of light wich is something impossible on itself.
They are there just so we can talk about and explain things but are abstractions.
Im sorry if a make anyone more confused. Its just my way of seeing it.
At least read that link if you havent already. Its the best.
http://www.itchy-animation.co.uk/light.htm