Check out my Portfolio on Behance with two additional images and leave some love
I know that the concept may not be original but I just wanted to play around with tentacles and the old Wacom pen I build two years ago. Built with blender 2.76 and and Photoshop in around 2 days.
The arm is modelled in a slight curved pose, as shown in the second image, then brought in to shape (more or less) with an armature and simple envelope weights. The whole thing rendered in Cycles. 90% of the image is direct from the rendering. I just corrected the contrast and added the backdrop in post.
Sorry for the grainy renderings but my machine doesnโt handle CPU rendering too well.