Should i be calling "renderTexture.display();" when altering a rendertexture?

[killerloader]

I've always used "renderTexture.display();" after recreating an entire renderTexture, should i also be using it after only slightly altering a rendertexture? For example, if there is already lots of information in a renderTexture, and i decide to draw one extra pixel on it, should i then call display?
I've never encountered problems when not using display in this case, AS OF YET.

[eXpl0it3r]

The documentation and tutorials are clear about this. You have to always call display().