" vec2 offs = vec2(float(i)-1.5, float(j)-1.5)/screen_size;\n"
" float dxy = length(offs)*-sample;\n"
" float dz = depth_ratio.x/(texture2D(depth, texcoord+offs).r-depth_ratio.y)-sample;\n"
" vec2 offs = vec2(float(i)-1.5, float(j)-1.5)/screen_size;\n"
" float dxy = length(offs)*-sample;\n"
" float dz = depth_ratio.x/(texture2D(depth, texcoord+offs).r-depth_ratio.y)-sample;\n"