How could I put put a node with a transparent texture coming from a picture? I don't want any reflexion, just display a normal image.
So to get alpha working on a texture, click in the material on "Use Nodes" and change the color to use an image:
Then, open the Shader Editor to edit the nodes, and make sure that the alpha is set to Premultiplied in the settings (press N) of your texture. Then, create a node (
Transparent BSDF, make sure it is white, and mix it with your image, using the alpha as factor (if you want to keep material, you can use the
Principled BSDF node as input to your color instead):
This gives you something like that:
If you get a white border around edges, make sure that you selected