Hair Problems

Irensay

Hi guys, I'm so desesperate with the hair, I'm using 4.17 unreal version and Temporal AA antialiasing mode, for a long time I've been trying to create a realistic hair for our game but it's impossible trying to reacreate it without this blurry texture, when you are moving the hair seems like this, I've tried changing antialiasing mode, I haven't applied postpro, I've tried creating a simple shader only with the texture whitout any other node (the hair it's using opacity mask).

I really need help with this, hope you can aid me, if you need any more info, please do tell me.

Irensay

We discovered the issue.. but we dont know exactly where. At the moment we think it's a bug on unreal's version 4.17 .. And it seems to be fixed by 4.18 and 4.19 so... it's upgrade time! Painful upgrade.. Thanks.

Obscura

Hey. 4.19 has superb temporal aa with very good super sampling. Give it a go, it fixes the most of the ghosting.

Irensay

Thanks Obscura. I found out that the ghosting problems was due to the hair being rendered one frame behind ot the head rendering. Basically, I found out that Unreal renders children of static meshes 1 frame behind, and as the hair was a child of the head mesh, it was always behind, sometime even completely dettached as the animation was not applying correctly. We just put the static mesh at the same level as the head (something not so inmediate, your first though is that the hair should be a child of head... but... ok Unreal, you win this time) and re-attached it to the socket. This solved the ghosting issue.
Any way, we are still experiencing the material's issue.. So we'll have to check times, schedules and see if it is worth to upgrade from 4.17 to 4.19 once it is stable enough.. As far as I'm concerced, it is a mostly bugfixing update.

Thanks everyone!