The only thing left it's change the size of the image, rotate the image and if the image have transparent background it doesn't have to show that white rectangle.
Here's the example: test.blend
Rotation and scale can be done through the corresponding mathematical transformations. Math and Vector Math nodes are very suitable to do it. Also, it should be noticed, that rotation goes around the canvas center, so drawing the image centered should yield the best result. I've added the "Value" nodes to control every transform independently.
FYI, there are some transformation methods for the canvas context, that allows you to draw the image scaled and rotated: link
, but it's also tricky to control the proper position of the drawn image.
You have an opaque background, because you are using a JPEG image, which cannot contain an alpha channel. You should use PNG and the image should be transparent itself.
If I'm not mistaken I have to add more sliders and nodes but like I said at the beggining of this topic I'm new with nodes :/ where can I find info to achieve this?
Yes, you can more sliders or some other input fields to change the "Value" nodes in the node material.
If you want to know more about the node materials you can read about them in the Blender Manual
, or search for more concrete blender tutorials. You can also read the corresponding chapter
in the blend4web manual, but the information there mostly describes our special nodes, which are very specific.