Ticket #53 (closed task: fixed)
Color grading
| Reported by: | gongminmin | Owned by: | gongminmin |
|---|---|---|---|
| Priority: | major | Milestone: | 4.0.0 |
| Component: | Core-Rendering system | Version: | |
| Keywords: | Cc: |
Description (last modified by gongminmin) (diff)
Add color grading post process, including rendering and tools.
Color grading is very important for high quality rendering. The kernel of it is a look-up table that transform a LDR RGB color to another. The look-up table can be store in a 16x16x16 3D texture. Use RGB as coordinate to do the looking up.
The editing process has 3 steps:
1. Generate a identity look-up table. The output is the same as input. It's a 2D image with 16x256, flatten the Z dimension.
2. Capture a frame in game, tune it's RGB curves inside image processing tools, such as PhotoShop?.
3. Apply the tuned RGB curves to the identity look-up table image.
4. Pack the 2D image to 3D volume texture.
So what we need is as these:
1. A color grading post process.
2. A tool to generate a identity look-up table.
3. A tool to pack that table into 3D.
The tool in 2 and 3 can be done by one single tool with different command lines.
