Decal alignment

[dazuk1978]

Hey. I recently started placing deferred decals and have hit a problem with the stretching of textures as they hit other surfaces/objects.
The best way I can describe it is that it tries to project the decal in 360 degrees rather than locked to a ‘plane’ or define any tolerances.
Maybe I haven’t discovered yet the way to get around this other than blueprinting some auto correction etc but I have used CryEngine’s deferred decals and the system just works in that,
You choose your projection type of ‘Plane’ and it will not show the decal above certain angles a few degrees from the angle of the plane you are projecting to. This means no stretching and no weirdness.

Is there any way of getting this to happen in UE4?

It would be great if it could auto-adjust the mapping so the single decal can wrap onto surfaces of any angle and not stretch but I’d settle for it culling the parts of the decal that are not going to display correctly and then I could place a separate decal of the same type onto the place I wanted to continue the original decal (say as a blood splay that is on the floor and up the wall also).

Dunno if that’s clear or not but anyone who’s played with the deferred decals probably gets what I mean!

Thanks,
Daz

Edit: Images to show what I can do in CryEngine:

[anonymous_user_6e7b421a]

Hey dazuk1978,

Unfortunately what you are requesting is a current limitation of decals within the engine. We are working to improve upon this feature and we appreciate you taking the time to report this issue. There are some known workarounds which you can find in the documentation below. It also lists some other current limitations with decal actors.

Decal Actors

Decal Actors

Let me know if you have other questions or need additional assistance.

Cheers,

[Kajiisan]

Any news on this one?

[anonymous_user_6e7b421a]

I believe that since this was entered, the limitation has been improved and I can get some great results as long as you follow the rules when placing a decal. By that I mean, making sure the angle of the surface normal matches that of the arrow.

Decal Example

Let me know if you are experiencing issues or come across other limitations.

Thank you,

[Andrei_Despinoiu]

It looks SO much better around corners.

Please don’t fix this, Epic!

This effect is everything we need in games. “Wrapping”… Please.

Using UE 4.17.1 (the latest version).

[jiangdengc]

i also encountered this issue

[JohnnyDale]

Found a solution to the stretched projection:

This goes into opacity.

[SpazzGibbon]

This is the one that works! excellent stuff

[Alyrio]

Life saver. Thank you, my friend