These are transformation that involves a mesh with the option to set up your own direction vectors, and with ease of manipulating a large area with a highly smooth area. These tools are more efficient for placing textures in a non-destructive manner than the current liquify and warp tool. As of now, it would take a lot of stroke to do this with the current liquify tool, and especially with extremely large image where it would take a huge ton of memory to work with. These tools essentially solve these issues with the current Krita tool. For a example - https://www.youtube.com/watch?v=o_pkpBEVYZE For justification to support to add this feature, let's see this quote: - Krita is a professional FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone. concept art texture and matte painters illustrations and comics - Concept art. Concept artists would highly benefit from this tool as they can use a 2D picture, and they would be able to project that texture into a perspective view of a mechanical concept. It would also benefit other area of concept art. This is the main use of Inkscape-style envelope tool or Photoshop warp tool. It would also benefit texture artists, as well as they can use this to preview how textures may look onto other surface.
Another example - https://www.youtube.com/watch?v=ul1l3K6nVgI Note the direction vector can be manipulated with ease unlike the current warp tool. This video shows how it can benefit concept artists.
a) this is clearly a feature request, so the priority should be "wishlist" b) a feature request that goes like "add feature from app Y" isn't helpful c) I'm not going to spend time looking at videos, but your description sounds like what you want is the cage option of the transform too.