shader2/res/shader/RenderDepthBuffer.fs

uniform sampler2D U_MainTexture;
varying vec2 V_Texcoord;

void main()
{
	//float depthValue=pow(texture2D(U_MainTexture,V_Texcoord).r,8.0);
    //gl_FragColor=vec4(vec3(depthValue),1.0);

	gl_FragColor=texture2D(U_MainTexture,V_Texcoord);
}