cmd_shader

command: /shader

quick ref:

/shader [0,1,2,3,4]

description:

graphic shader. default to 1
/shader 0	fixed function;
/shader 1   default
/shader 2   shadow+reflection
/shader 3   shadow+reflection+HDR+Bloom+Vignette
/shader 4   shadow+reflection+HDR+Bloom+Vignette+DepthOfField
	```

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