Thread:RickGT/@comment-171752-20190123215639/@comment-171752-20190212153345

Sure thing. All you need to do (on the test wiki) is update new versions of these images:
 * Portal-GTSport.jpg
 * Portal-GT6.jpg
 * Portal-GT6-small.jpg
 * Portal-GT5.jpg
 * Portal-GT5-small.jpg
 * Portal-GT4.jpg
 * Portal-GT4-small.jpg
 * Portal-Series.jpg
 * Portal-Series-small.jpg

Just be sure that the new images are exactly the same size as the placeholders, so 856x450 for full size and 300x113 for the small ones. Once server cache updates, the new images should automatically appear on the portal.