Digital entries are allowed for every category. However, digital entries will be judged seperately and will not be in the running for the respective category prizes. Instead there are two separate prizes for the two highest-scoring digital entries.
You are free to use any software of your choice, and there is no restriction on what elements or colors you can use nor if your build is actually physically possible.
Digital entries do not count towards the Dragonslayer. However it will be tracked on the Hall of Fame as a separate score.