Some resources like textures, sounds or 3D-meshes are read from files. Depending to project location or Marilou installation folder, resource path have to be managed intelligently. That's why, in most case, Marilou stores resources paths with two paths: 

The path is stored with an absolute path like c:\xxxx. If the absolute path is under the Marilou directory, it starts with %MARILOU_INSTALL_DIR%. 

The path is stored relative to the document that use the resource. A texture for exemple is stored relative to the PHX document that is using the texture. 

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.

Before you begin