I want to put a 2D image on a 3D object in Blender. How do I do that?
I have found the "textures" tab in the "properties" window, but I can't figure out what to do with it.
Preferably, I would like to click and drag an image off my desktop right onto the object.
As you tagged this with unity you will want to use Blender Render and not cycles, this needs to be selected at the top of the window.
In the texture settings, check that you are showing material textures (the centre button above the texture list), click the new texture button, ensure Type is Image or movie, then open your image file. This should leave you with something like -
By default you won't see the effect of the image straight away in the 3dview, you can switch the viewport shading to material or rendered to see the result.
There is also an addon called "import images as planes" that you can enable, which will create a plane and apply the image you select as it's material.
First off you can just drag an image right onto the object to add the image.
Now before you get too excited, there are some things you have to do to get it to work before it will render like that.
First, you have to be using the Blender Internal render engine for the drag and drop to add the image to the object.
To actually get the texture to render you have to use the material, and the texture panel. (more on why it "no clicky-worky? no typy-worky?" later.)
My answer explains how to set up a material and texture for the BI. Only difference is you have already imported the image, so instead of clicking on the Open button, click on the drop down button to use a image already in blender.
Now for cycles
My answer explains the procedure for using images in cycles. Just know that you drag the image in to the node editor, not on to the object.
Now to your "no clicky-worky" problem, I think that stems from the different render engins, cycles and the blender internal. See this question for help on that.
