Simple 'surf'-plot
Gf = linspace(2,10,20);
If = linspace(10,100,20);
[X,Y] = meshgrid(Gf,If);
HOMAIR = X.*Y / 405;
QUICKI = 1./(X.*Y);
surf(X,Y,HOMAIR); hold on;
surf(X,Y,QUICKI);
alpha = .5;
set(gca, 'ZScale', 'log')
rotate3d on
set(gcf,'Color',[1,1,1])