void t3set(int x, int y, int z, int v)
This function sets the value of one channel for a pixel in the third tile buffer; the pixel is at coordinates [x,y], and the channel to be set is given by 'z' (0 = red, 1 = green, 2 = blue, and 3 = alpha).
%ffp ForEveryTile: { for (y=y_start; y<y_end; ++y) { for (x=x_start; x<x_end; ++x) { for (z=0; z<Z; ++z) { // set all pixels white t3set(x, y, z, 255); } } } return true; }