## Section 5.2 - Absolute masks

As you can do
relative masks, you can also do absolute ones, the only problem being that you
can't do so with picture bigger than 256x256.

The advantage is that you can sometimes see better what you are doing. I have
done a mosaic-like picture once using absolute mask. (With modulos to make
"stairs", to have the coordinate remain the same if we remain on one
"step"...)

As you would have
guessed, you use expressions like r(0,r(1,x,y),g(1,x,y)).

I let you explore
this if you want :-)

...

Okay. We reached here the
end of the tutorial.

I hope you enjoyed reading
and experimenting this. Please do not hesitate to mail me if you have a query,
if you made a cool picture (eg, to put it into the gallery)... If you would like
to make an effect but do not know how to make it... If you found some cool
mathematic formula that does pretty drawings...

I would really be pleased to
recieve such feed back :-)

...

Concerning myself, I will
continue updating this tutorial every time I find something new... I will maybe
write more 'raw' mathematical theory, to help you build two-vars implicit
functions [f(x,y)=0] and two-vars explicit functions ([r,g,b]=f(x,y)), as I
think these are the areas were we find the most power for creating/modifying
images.

It was a pleasure for me to
write this tutorial, and again, I hope you enojoyed it :-)

Regards,

Maxime Gamboni

Index

#### Chapter five:
Using masks

5.1: Selection masks

5.2: Translation
masks

5.3: Absolute masks

**End Of Tutorial**