The main content of this lighting course is Preparing the HDRI, Setting up Light-Rig and Improvements to be made. In this process, I learned the process of HDRI in Nuke, and how to use and adjust HDRI map in Nuke and Maya.
The first one is Nuke’s introduction:
CTRL+A select all nodes
Select a node and press 1 to display the screen
matching Exposure and color
Crrl+Shift+mouthmovebutton select the background wood area, as the original picture information reference，and records the RGB value.
Crrl+Shift+mouthmovebutton select the wood area and watch the color value. Then control the value of the R channel through the exposure node.
multiply controls the parameters of the G and B channels to match the previous parameters.The brightness of the HDRI map can be adjusted through these two nodes.
Use exposure and multiply two nodes to match other pictures.
Separating the HDRI into Hi / Low pass , North / South Dome. Then import those pictures into Maya.
In Maya, the light source direction of the object and the reference is matched by rotating the environment light.
match the ground
match the charcaters
If only the characters in the environment are needed to rendering. We can perform the operations of the above two pictures. These parameters can hide object rendering and light rendering respectively.
This is the rendered picture after the environment is removed. The surfaces of the two characters still have information about the surrounding environment and HDR.
The picture shows the working principle of Mayamel. 1 and 0 in the picture control the rendering on and off respectively.