Vertex painting - issues

[Tetref_manufacto]

Hello,
I am new to this side of 3D art (previously was doing some cinematics etc) and I decided to create myself a beatiful vista to look at in UE4.

(I am just gonna ommit that Megascans plugin seems to be broken in 4.26 completely for me and engine won´t launch after the initial splashscreen)

So in the 4.25.4 I am using megascan “Create Material Blend” function to create myself a material instance for some initial Vertex painting. From what I understood there is no need to change any parametr in the newly generated material instance.

I place a default mesh in the scene from the editor selection menu and drag and drop the genereted material instance which covers the mesh with the base map quite nicely.
I select it and go to MeshPain tab, selecting the brush.

Following any intro on the internet it should be good to go as soon as I tick off some of the R/G/B options in the brush settings but my brush wont do anything. I am clicking with my LMB like crazy (and trying shift+LMB as well) but I just can´t see any changes and there is only the base layer visible.
When I try to see the mesh in the “RGB channel” to paint in R/G/B my mesh disappears completely and I cant see it until I switch the “Color View Mode” back to “Off”.

I feel stupid but want to learn, would be glad for any help. Cheers!

[Tetref_manufacto]

@ConradG

What does the Mesh Pain settings look like?

Hello there! Please see the picture and thanks for reply.

@Mach45

Hey, would be worth posting your material blueprint so can have a look at that… Also I found a lot of modelling packages import mesh vertices as white (RGB: 1,1,1) so they’re already maxed and if you try to paint any layer it won’t show any effect, you either have to reimport the mesh with the import settings setting vertex colours to 0,0,0, or in Mesh paint select RGB then shift-paint the whole mesh (basically setting all the vertices back to 0,0,0 then try painting normally…

Hi!

I am using the basic meshes from the UE - like a plane or cube. So I am not really importing anything in.

Also the material blueprint is not created by me but by the megascan plugin and I didn´t touch it.

Here it goes:

[Tetref_manufacto]

@ConradG

I’m not familiar with the defaults of the unreal meshes. Try importing your own simple object. There is a setting to ignore vertex colors, replace vertex colors, and override vertex colors. The asset you’re using might be set to ignore.

I dont actually see any setting regarding vertex when importing a .fbx file into the UE4.