my problem is, when i make a cleanplate in paint and stick it over the orginal footage as usual, it gets blurred!! its not much blur but little.. it usualy happens when i attach my cleanplate on a trackingdata but i havent put motion blur on so i dont understand where the blur is coming from..
Are you using the Action module to position your clean plate over the background?
Any transformation in Action results in some softening of your image.
You can try and minimise the blur by changing the rendering settings on the specific layer in Action.
In Action, select your clean plate layer.
Click on the Object tab.
The Rendering tab is usually set to Linear. (bottom of the screen, third column from the right).
Change the render setting to Nearest, for no filtering.