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Environment shader

Implementation
- 01
shader node
Back-face color is handled with Is Front Face
Dither is used for a low-spec friendly fade
Length keeps the value increasing in both directions ( prevents the whole thing from being erased to black )

Smoothstep으로 블랙마스킹
Smoothstep is used to mask in black so contact with the ground is anchored smoothly
A Sine wave controls only the R channel as a Wave

Wave 구현
Wave implemented the same way
Absolute World Position is used so the wave direction changes when placed at different positions
