Creature effects.

It's best to work with the advanced map editor here. Open the creature through it and find the effects in its animations, then change the textures to others. The advantage is that you can immediately scroll through the animation in the editor and see the result of the color change.

Thank you for the advice.
Could you please provide more details? I'm new to this. The editor is in advanced mode, and I was able to open the creature. I don't understand what to do next. There's a creature model with its arms outstretched and a sword nearby, but I can't do anything. On the right, I can only select the model's lighting, and on the left, I can open it as materials, skeleton, geometry, or animations. In all four options, it looks exactly the same, but I can't do anything with the mouse. None of the buttons in the tools menu are active.