Can I use an altered art card in tournament?
The image of the cards you sent are a perfect example of acceptable altering for tournament play. As far as commander games go, you can sometimes get away with not even having a legal copy of your commander and instead playing with an oversized version of the card. Commander is very lenient and you can usually get away with altering cards so that they don't have any rules text. So long as there is some way to identify that the card is what it is, people will be accepting of it.

Altered art mostly just falls in the category of DBAD. Don't draw porn on your cards, don't draw children being decapitated, don't try to alter your Misdirection to look like a Force of Will.