I rememeber there was a thread about that around here ... It has to do with establishing a perspective camera in the angles needed and then turning it into an ortographic camera in the attribute editor. I know I´m missing the exact details .. but I´m sure this is the way.
adldesigner's right. Just make a new camera. Set it at the angle u want then go to the attribute editor and switch it from perspective to orthographic. That'll give you an isometric view, since there won't be any perspective flaring.
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