I just recently finished a project in which I had to make some animations and FX for a video mapping on a Hotel. I used particle flow for one of the effects, nothing really complicated, just some particles moving randomly creating some trails, the only particular thing about this project is that I was using a lot of particles to create the trails.
Using corona renderer the "Transforming Vertices" stage is really slow, around 30 seconds , rendering itself takes less than one second.
I already researched the problem in the forums for a solution, but my specific case is not related to any other of the reported instances of the slow parsing time, I am not working from a network drive and I am not using Particle MBlur.
I made some testing with simple materials with and without particle age map and this issue seems to be related specifically to the amount of geometry generated derived from the amount of particles being rendered, I tested with and without particle cache and tried with different shapes and shape instances and the shape with the least amount of triangles was the fastest to parse.
I tested with different versions of corona all with the same results, when using Vray, Arnold and native scanline the render just starts right away.
I ended up using Arnold to render this effect as it was the only rendering engine that was able to give me the same visual results I was looking for without the added parsing time but I wanted to let you know about this "issue" as I love to work with corona and would like to see this addressed.
Thanks!
Windows 10 Creators Update
3ds max 2018
Ryzen 7 1700x
32gb Ram
GTX 1080
