First of all, please excuse me for my poor english.
I’m new to blender (and to 3D modeling in general). I’m trying to model a Dragon Sculpture. I’ve got a trouble with this. I think that this problem comes from an abusive use of the “Subdivide” fonction in order to create vertices and faces to model. Here’s the actual problem. As you can see, this result in the multiplication of many faces with different shades of grey… How can I fix it? How can I improve my modeling?