We have three main mechanisms,

1. Artists wander around and overwrite each other’s trace
2. Grab the Item and return it back
3. Solve three separate puzzles to get items

#1 Artists wander around and overwrite each other’s trace

This feature could be spilt into many small steps, so I start with drawing on texture.

It doesn’t work well on URP pipeline, so I tried Trail Renderer.

But it didn’t work well.

I asked Eric and Hermon for help, and Hermon helped me to rebuild the paint system at a starting point. AND it works!!!

We’re using the ray method to achieve to paint some colours on the texture, and the trace could be covered by the other objects.

So here are the list I need to go through for next steps

1. Replace the colour with the shader I made.
2. Make NPC moves using NAV Mesh.
3. Let NPC draw the ground.