Decals on Android do not work. What is a alternative Solution?

Development Rendering
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1

Hi,
I am doing a small Paintball Shooter for mobile devices. The impact of the color bullet should be a blur of color. For that i used decals on the desktop version of the game, but for Android they are not showing up.

A similar question was asked 2 years ago, but with no answer.
Thank you for your help and excuse my English :-D.

PS: I am a newbie in ue4 and this is my first post in the forum! <3

2

Forgive me if this doesn’t help but…
Here’s a part of s post I thought may be relevant to your situation;

I got mine working by following the
instructions above, plus a few
missing/commented elsewhere steps (see
below)

Unreal 4, build 4.7.5:

While your decal-broken project is
open, open Project Settings: and
change these under ‘Rendering’:

32587-dbuffer.jpg
32587-dbuffer.jpg1527×1011 137 KB

Save & close your project

Search for ‘DefaultEngine.ini’ in your
projects folder (not ‘BaseEngine.ini’
which was likely the old name) & open
it.

Scroll down, look for
‘[/Script/Engine.RendererSettings]’ &
change these (may not be required)
FROM: r.EarlyZPass=2
r.EarlyZPassMovable=TRUE
r.DBuffer=TRUE TO: r.EarlyZPass=2
r.EarlyZPassMovable=1 r.DBuffer=1

Reopen your project

Open your decal’s Decal Material and
change ‘Decal Blend Mode’ to any of
the ‘DBuffer…’ options [I used ‘DBuffer Translucent Color’]

DONE! - it should now show up
properly!

1 Like
3

Thank you for your answer!
I cant open the image (error 403: Access to the specified resource () has been forbidden.) but I think you changed the following 3 in Project Settings:

  • checkbox for DBuffer Decals
  • Early Z-pass in “Opaque and masked meshes”
  • checkbox Movables in early Z-pass

I changed the statements (TRUE into 1) in the DefaultEngine.ini and used the same DBuffer Translucent Color.
It is working in the Editor but not on my Android phone.

Did it worked on your Phone? :s

4

EDIT:
I changed the Decal Blend Mode to “Translucent” instead of “DBuffer Translucent Color”.
Now I see my decals!
I choosed the DBuffer to display the decals in any lights, but maybe it is not supported on Android.

5

Glad you can see them now! That’s some good progress.
I’m not sure about decals being picky about lighting so I guess it’s a trial-and-error thing really.
I would suggest looking at some Android building rules to make sure all of your project will build correctly. Don’t forget to check if you have any errors as well after building.

6

Hi, because mobile uses a forward renderer instead of the deferred renderer we use on PC and console, we support only translucent, additive and modulated blend modes on mobile decals. For the same reason, only unlit decals are supported.

7

I can’t see your image linked. plz update your image or just typing for “rendering” option :slight_smile:

8

I ran into same issue, on mobile the decals did not work, the easy solution for me was to simply enable MobileHDR in the rendering settings and that solved my problem. My settings for decal material are simply “Translucent, Translucent”.
Then there is also this video that explains what to do for different decal rendering situations:

In the video description check the link to their website as well.