UE4 Vertex Paint alpha not working?

melviso

Having this same issue today. Is this a bug with ue4 16.1 version?
https://answers.unrealengine.com/questions/667739/vertex-color-alpha-channel-wont-work-for-me.html

Painting the alpha channel of vertex paint  yields no result.

Nate Broach

Did you have any luck figuring out the problem? I too am experiencing this. RGB works just fine, but alpha is totally unresponsive to vertex painting. 

melviso

Unfortunately no. I haven't been able to figure out the problem.

Klawd

Just stumbled upon this. I know this thread is from 2017, but I thought I'd leave a reply anyway, for posterity you know...

Basically the default vector4, when painting alpha vertex color, has alpha value set to 1, both on white and on black. Image to understand better:

Raindrawp

https://polycount.com/discussion/comment/2722143#Comment_2722143

bloody legend, thank you for your service

Klawd

Happy to help ;)