DeadInTheAttic:: i am intrigue by your progress so far, and i would like to suggest a few alternate steps that you can/may take to make your style go even further, because currently, your texture quality and your brush quality dont quite mix so well just yet, but again, this is still in the work in progress stage, so i may have been too quick to judge, and you have my sincere apologies for being too hasty like that =).
just as how you have your art at this stage, try blending some of your brush strokes OVER the top of some of the existing textures but not at full opacity( i am assuming that you are using photoshop or similiar digital pixel base appilication in approaching this piece). this way, your texture and brush strokes will blend better but at the cost of branching off to another set of style; so do take note, this will alter your style and approach slightly if not grastically in the long term, so read on at your own risk, as this is how i usually approach my work::
1. creating the base form of the composition
2. adjust lighting
3. color pallette
4. copy and paste existing elements in the piece and REUSE them as textures, and reclapse down everything into one layer, be brave lad, 
as this will create a trillion level of detail over the long run, and you can call the piece 100% yours and yours alone.
5. relit the lighting so the overall composition/color palette/ quality matches.
6. add in new elements as needed to streghten the piece.
7. check overall compostion.
8. take a break, roughly 15-20 mins, come back with a fresh mind and you will find a few new idea or adjustable existing idea already on the piece that can be alter/change/rotate etc.
9. search for inspiration if runing low/dry, you’ll be surprise with the amount of new techniques/lighting/approach/style/texturing/brushing/ etc that u can come up with =)
00. rinse and repeat any of these random steps at any time, again and again till you get to the quality result you like.
01. add in your own spices, and herbs, thus u will be able to season your own unique piece of raw meat =D.
again, this is not to say that this approach is a one in a galexy if not milkway approach, nor is it my alone, i am quite sure its already out there, and i find this approach very comfortable for me in approach any of my Illustration work.
once again, i am at no command in agreesively enforcing you to change your style, nor am i claiming at any base level and assumption that i am at any measurable skill sets in comparison to all of you pros ;); because having texture and brush base contents unmix togeher is a distinctive style/approach in it self. This is simply a suggestion in possible branching to existing styles that can overall help streghten your overall style/approach; because for me, i am just mashing together all the awsome style/approaches that i see out there and adding my own little twist and turn here and there, thus i would believe that it would not only streghten my current skill set, but making it more and more distinctive and unique to my own approach/style.
cheers,
