Combining images

Hello, I’m making a “badge generator” in blueprints and widgets. I’d like to combine some pre-defined designs + add custom colors to one image. I have no idea how should I do it.

create a material with as many textures as you want to add,
then set up their adding method in the material,
create dynamic material at runtime and fill in the textures with badges and designs and apply the material

If you want to add custom colors, I would suggest using Vector Parameters for color and Texture Parameters for the different designs for the badges. If you want to color different sections of the textures, use a texture mask and multiply its R, G, B or A components with different parts of the texture and add/multiply the results with the color values. I would definitely do some research into texture masks for more information on the subject. This will require some experimentation to get right and you can create whatever equations you want with the Add, Multiply, Divide nodes in the Material Editor.

Afterwards, you may create a dynamic material as suggested by ppchanvan001 and manipulate the Parameters via Blueprint Nodes.