Bug 388163

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:

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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

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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.