I would suggest you could make a basic "skeleton" of the antler shapes from thick gauge wire something that might have some rigidity.
Then I would probably either do paper mache or what you can use is stuff called Buckram. It is a material normally used to cover books its made of cotton and or linen type materials and when you soak it and let dry it hardens. I have seen some people use it on various Youtube videos for maleficent horns.
Then I would probably either do paper mache or what you can use is stuff called Buckram. It is a material normally used to cover books its made of cotton and or linen type materials and when you soak it and let dry it hardens. I have seen some people use it on various Youtube videos for maleficent horns.