TO Noxco... spacial order ...!! lets go

[hmsabry]

hi Noxco and to all of you

noxco has asked me "privately" to explain to him how to composite
a 3d rendered character to a live shots.


i made the composting "matching 3d characters with live shots" on Nuke


here we will deal with this subject.
but i will concentrate on how we blend a render objects to a
live shot.


i ask you noxco "practice with me" always and all who need to
learn to participate. practice practice practice.....

but i will do so in paragraphs due to my time... sorry

[~|hakem|~]

شكرا لك

وفي الإنتظار

[hmsabry]

first ... you have to match the light and colors mode in 3d
i mean ... if the shot is an out door lighting and is a sunny day
so you must have a direct light and sharp shadows
but if its a cloudy day so you must have a very soft lights
and a very very soft shadows. fine

so ... the important tool is the HDRI for the location coz this will give you
the same lighting and the same color mode and this our main target.

and after this we will need to blend this at the end in a composting
package "like Nuke"with the background

[noxco]

OK good buddy .....thanx for the concern..

The first issue is raised now: COLOR MATCHING . Let’s start with a STILL IMAGE as to be an integration back ground for a 3D model. I assume that the viewer is aware of using a background image in maya scene, and how to do an almost perfect CAMERA MATCH.

Now –

1-In addition to an HDRI / FG as an atmosphere lighting source, DO WE NEED A LIGHT RIG set up for the scene ( each light with a color value of a certain point in the back ground image ) ??

2- HOW to determine which is the most proper HDRI that matches our background? Regarding the LIGHTING and SATURATION?

thanx

[rabieart]

very nice topic
...good luck with u guys..
and thnx hazem for sharing ur info.

[hmsabry]

OK good buddy .....thanx for the concern..

The first issue is raised now: COLOR MATCHING . Let’s start with a STILL IMAGE as to be an integration back ground for a 3D model. I assume that the viewer is aware of using a background image in maya scene, and how to do an almost perfect CAMERA MATCH.

Now –

1-In addition to an HDRI / FG as an atmosphere lighting source, DO WE NEED A LIGHT RIG set up for the scene ( each light with a color value of a certain point in the back ground image ) ??

first... i meant to use the HDRI to pick the colors from it and the
lighting ..ok

there is a point "you catch it" which...

2- HOW to determine which is the most proper HDRI that matches our background? Regarding the LIGHTING and SATURATION

this is the most important thing in matching...!! and the solution
و اللي احنا بنسميه "حل بلدي .... لا مواخذه ....!!"
some times ... there are situations happened in some commercials
we did .... that we couldnt be there in the shooting to take our
HDRI ..!!
so ... my dearest friend ahmed yousry has created a solution for
this .... "بلدي"
and he call it "yousryBasedLight" Loooooooooooooool
he took an image of the sequence and wrap it on a sphere and make
it surfaceShader to illuminate with the same color
and we create a directional light to match the main light and to cast
shadows

so like this we will catch color bleeding from the same color of
the scene..
and this is the hardest part in our mission "colo matching"

we do this technique "yousryBaseLight" in most of our commercials
and its perfect.
we did it in TEData "the above commercial"

try it

[rabieart]

hey hazem... why u call that "yousryBaseLight" and i sow lots of the artists using the same teqn. for me its not new thing or maybe u guys adding something ales which i don't know!!!!! cuz just warp a HDRI on surface shader ...its not new teqn.

[hmsabry]

hey hazem... why u call that "yousryBaseLight" and i sow lots of the artists using the same teqn. for me its not new thing or maybe u guys adding something ales which i don't know!!!!! cuz just warp a HDRI on surface shader ...its not new teqn.

no you didnt understand me..
we take "an image from the live sequence of the commercial "and wrap it
to a sphere.
its not a HDRI... but its an ordinary image from the sequence of the live
shot we take it to just catch the color bleeding and the mode.

[mazm]

no you didnt understand me..
we take "an image from the live sequence of the commercial "and wrap it
to a sphere.
its not a HDRI... but its an ordinary image from the sequence of the live
shot we take it to just catch the color bleeding and the mode.

i think you said it old way and all people doing the same techniques

no choices

[hmsabry]

my friends ......
we have a target ... we need to get over this point
it doesnt matter whether it was an old technique or it was a new one
all what really matter ... is it has a big deference...?? will it give me the
real color bleeding ..?? the real color mode..??

i think there is much we can do
so lets continue

[mazm]

yes, go ahead to the next step please

[paciman]

يلا شباب ..

إلى الامام .. الى الخطوه الثانية

و خلونا نبديها بالكلام العربي ..

اعرف ان بعض المرات يصعب الترجمه ..

و لكن لنحاول .. نحن هنا لنتعلم ..

و الله يوفقنا جميعا ..

[hmsabry]

في ثلاث نقط اساسيه في الموضوع ده
1- matching colors by lighting "HDRI" وده اتكلمنا عنها
2- في ال Nuke نعمل color correction وتظبيط ال color grading وده معناه
تظبيط الفواتح و الغوامق في ال 3d rendered images الي ال live shots
3- وضع ال effects المطلوبه "depth of field, distort, dust, ...."

[hmsabry]

is there any body out there..??

[noxco]

" is there anybody out there
sounds like a pink foyld's demo....
I'm stuck in creating simple light rigs to simulate a serrounding atmosphere . I did your style PANORAMIC image hemisphere for lighting.