Marilou install dir is C:\Program Files\Marilou2009
You are working in a PHX document located at c:\myprojects\project1\myrobot.mphx
Your texture1 is located in c:\myprojects\project1\mytextures\texture1.jpg
Your texture2 is located in C:\Program Files\Marilou2009\RenderModels\Texture\texture2.jpg
Your texture3 is located in C:\myimages\texture3.jpg
Texture1:
Absolute Path=c:\myprojects\project1\mytextures\texture1.jpg
RelativePath=.\mytextures\texture1.jpg
Texture2:
Absolute Path=%MARILOU_INSTALLDIR%\RenderModels\Texture\texture2.jpg (in this case, absolute path is relative to Marilou install dir)
RelativePath=..\..\Program Files\Marilou2009\RenderModels\Texture\texture2.jpg
Texture3:
Absolute Path=C:\myimages\texture3.jpg
RelativePath=..\..\myimages\texture3.jpg
When loading resources, and according to the 2 paths, Marilou searches the required file starting with the relative path then the absolute one.