Technically, the artist needs to (and does) credit the author of the artwork he referenced and only mention what and where from the character is. Given that, this is a 3d/gaming/technical thingie-ma-jibs website that does not (and probably shouldn't really) reflect on the circumstance of the character itself, but concentrate on creation and techniques used in creation. The name of the character is referenced, but nowhere on the original art the name Sam Riegel is mentioned. As much as critter community is nice and welcoming, this part of "CREDIT THIS OR CREDIT THAT" irritates me. IMHO, Credit is given where credit is due. This 3d model was made with learning purposes only, whereas the original art is being sold. Instead of commenting "GIVE CREDIT" comment "COOL ART OF SAM'S CHARACTER" or "GREAT CRITICAL ROLE ART". All that said, this is an amazing rendition of the original artwork of the character of critical role. As a critter, I love both this piece and the idea of other critter being so talented! Peace, a member of the wonderful critter family.
You need to make it clear that this is an interpretation of someone else’s character and credit them (Sam Reigel, from Critical Role).
As great as this is, it’s not actually “your character” so you should really credit Sam Reigel of Critical Role who created this character, and make it clear this is your interpretation of it, because you make it sound like it was all your idea.
ShotPacker is a useful UV island packing add-on for Blender by Gumroad user ambi. This algorithm for packing UVs inside the tool might save you tons of time.
Use “Install Add-on from File…” in Blender User Preferences/Add-ons and navigate to shotpacker.zip. Then turn it on in the add-ons tab.
The add-on is located in UV/Image editor Tools tab under Shotpacker.
Island iterations determine how many iterations each island will take. 20 is fast. 200 can be very slow. The function is exponential. The higher the number, more precision you will have.
Rotation is rotation step. 0 is no rotation. 90 preserves texel orientation. For example 20 rotation means the island is rotated to 360/20=18 different positions at every checkpoint. 20 rotation also increases the running time 18x.
Flip allows or disallows mirroring the island over an axis.
Margin determines how big the edge margin is for the island. 100.0 (%) is the length of the entire UV area. So something like 0.5 is in the reasonable range. For example with 1024×1024 textures, 10 pixels is 10/1024 = ~1.0 (%)
When you’re satisfied with parameters, just click Start pack to start the algorithm. Press escape to cancel the execution.
You can optionally turn on Blender console (Main Menu > Window > Toggle System Console) to see what the add-on is doing in a more verbose form.
It’s recommended to CTRL+A (average islands scale), CTRL+P (pack islands) to pre-pack the islands before running the algorithm, if you’re having problems. It ensures that the islands are sorted as Blender sees them.
You can learn more about the tool here.