This one was fun. I remembered I already did something like that… and it wasn’t straightforward to say the least.
As you can see, I unwrapped and used an armature. I used an armature because I needed a regular shape to unwrap because UV coordinates are the only ones which remain constant despite the armature. (Kinda circular reasoning…) :eyebrowlift:
Any way, an armature is always a good idea to deal with tentacles. It’s easier to pose the tentacles than to rebuild them to change their position. Note that this armature is a bit light but it’s good enough for a forum quickie like that.
Note also that the UV map is fine as long as you don’t want to add details like eyes for example. I already have an idea how to do it but it will become tricky… trickier than it already is.
A bit of explanation. The node group “UV relative distance” calculates the distance of the “UV point” used by Cycles relatively to the center of the UV map (0.5, 0.5) and that’s the factor for the color ramp. Multiplied by 2 since the result is in the range 0 to 0.5 because of the offset. (More or less.) Easy. That’s also why the UV map is the way it is, with all the tentacles spread around the central sphere.
(Now that I’m thinking of it to try to write something which makes some sense, it would be simpler to use my UV map with a radial gradient as factor for the color ramp. Or even a regular gradient if you set UV map accordingly.)
Any way! It did it this way, this time and I find it a real pleasure to be able to pose your little creation or to change its colors and see the result in real time.
Your turn! Here is the blend file: Forum Volumetric.blend (131 KB)