Thanks for sharing - some great transitions!
Normally i don’t do much with transitions and i think you should use them sparely or at least consistently. As a newbee you tend to overdue things with filters and lots of exotic transitions ending up with the viewer paying more attention to the effects than to the content of the film. Normally you shouldn’t even notice the transition - its just an element to combine 2 clips smothly. When the effect itself gets the focus - there is normally something wrong.
But anyway, coming from Magix video de luxe there were a few transistions that i liked esp. for slide shows that i couldn’t find here:
A door that opens to the back in 3d, so in a perspective way. door can open to the right, to the left or in the middle. You can probably quite easily achieve that with keyframing positions in a trapezioid form but maybe there is something similar already?
For a slideshow there was a kind of 3d cube and you pin your images on the faces of the cube and then rotate the cube to the left/right/up or down to show the next image on the next face of the cube. I liked this a lot and you probably can achieve it in a similar way like the first one.
Btw: the “Kdenlive Git” link for transitions on the resources page doesn’t seem to work.