int currentIndex = column + Nx * row;
Vector3 centerCoord = tgs.CellGetPosition(myCells[currentIndex]);

int texture_height = my_texture.height;
int texture_width = my_texture.width;

int dx_texture_size = texture_height / Nx;
int dz_texture_size = texture_width / Nz;

int pixel_coord_x = dx_texture_size / 2 + column * dx_texture_size;
int pixel_coord_z = dz_texture_size / 2 + row * dz_texture_size;

Color cell_color = my_texture.GetPixel(pixel_coord_x, pixel_coord_z);