I'm trying to create a rainbow spiral like this, but how can I do it?
I can create this spiral but I don't know how to fill it with color (even though it's all 1 curve), and also I want to do something like the vortex-like bleed effect over the whole pattern.
Also I like the way there seems to be a curved gradient around the spirals, but how can I make a curved gradient in Affinity Designer?
I made this by using triangles and linear gradients, it's not great but I'll add it here to show my progress and things that I'm trying:
Using the technique from @G13RL on a spiral asset I downloaded and a gaussian blur I've made this attempt:
Using the brush tool provided by @firstdefence I've made this next attempt: