What happens after dragging and dropping a texture directly on an object? I am new to blender and as an experiment I dragged and dropped a texture from the file manager directly to my object in Blender. Now I see a texture on it in when Solid or Texture Viewport Shading is selected.



However, after switching to Rendered Viewport Shading there is no texture. The object is gray.



As you can see on the screenshots, the object has no materials or textures in the corresponding panels.

My question is: what happened to the object? Why is there no material/texture when the texture is visible in Solid mode? And how do I delete that "ghost" texture so that my object is gray again in Solid mode?
The Image you have drop down is present in the UV editor. If you drop down the image editor image you get it.

As soon as you click the image in the UV image editor then you can excess in texture also.

Create a New window -> UV Editor and from there you can find the image from drop down.

Now you can access the image apply to as texture material on the mesh