Nope, sadly bryce doesnt do scripts...
U'll need to change this for every individual texture.
Unlike many other programs, bryce doesn't store its textures seperately from its objects. Each object has their own texture, textures do not seem to be instanced onto multiple objects (at least not on interface level, it might instance identical textures at rendertime, but there's no way to tell if it does this or not).
A texture is related directly to the object its placed on, instead of having the object relate to the texture.
This means that, unlike in some programs, when u change a texture in bryce, it changes only on the objects that are currently selected. U'd hav to change it for each object. OR save the changed version of the texture, select all objects that need to hav it, enter the matlab with all these objects selected, and then apply the saved mat to all of them at once.
Unfortunately u cant change a texture, and then hav other objects that also use this texture change along automatically regardless of if they were selected at the time.
You can also not change the specular halo's on several different textures at once.

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