Operating system: Manjaro 18.0.1 Illyria / x86_64 Linux 4.14.90-1-MANJARO
Graphics card: Nvidia 1080 Ti
Broken: 2.80 (sub 39), Commit date: 2018-12-29 18:10, Hash 266b1e2cdbc1
Worked: 2.79 (sub 6), Commit date: 2018-10-22 16:17, Hash 86dbbd156fa
Short description of error
Unless baked, dynamic paint does not affect the final rendered image but is properly displayed in viewport.
The default and expected behavior is to be able to render the effect regardless if baked or not. This is how 2.7x operated in the past.
Moreover this problem, which I assume has something to do with vertex colors has caused other issues with different addons that depend on similar workflows of modifying the vertex color using the python API (eg. proximity, stress mapping etc.)
Not sure if T51214 is related since it's from April 2017. If so please close as a duplicate.
Exact steps for others to reproduce the error
Two blend files attached, one for 2.8 and one for 2.79.
2.79 file works as expected.
2.8 file is broken unless baked.