My whole process record video more than 4 hours of work to do a Black Widow with ZBrush you can apply this method for doing a spider type creature in ZBrush as a plus I added the Final Model to open in ZBrush.

if you have a question you can contact me to answer your question.If you need 3D Game Assets or STL files I can do commission works.thanks for buying and I hope you can learn something.