Fixing Bad Grass Shadows in UE4! (READ DESCRIPTION FIRST)

You CAN SKIP the part in 3:33 - 6:46 where we Duplicate the Mesh and simply put this in your Grass Material first (YOU STILL NEED TO MAKE UPWARDS NORMALS) - https://imgur.com/a/2LEZdEL

You can also skip when I mention creating Duplicate Faces in Blender from 9:33 - 11:38, basically just ranting about how the backfaces of Normals are always the OPPOSITE of the front face.

There are Chapters in the Progress Bar you can use as a guide :)

00:00 Intro
03:33 You CAN SKIP (READ DESCRIPTION!)
06:46 Fixing Diagonal Grass
09:33 More Stuff you CAN Skip!
11:38 Wrap up and shameless Discord Plug

HUGE thanks to Divivor for showing me the magic of TransformVector - this saves a lot of vertices! (I'm not entirely sure on how Unreal renders double-sided materials... Either way, it saves the extra set-up time!)

Today we're fixing bad Grass Shadows in UE4! This became a real issue for me since I use a global cel-shader (which you can build yourself here:    • Advanced Cel-Shader in UE4 & UE5 [Prismati...  )

A common solution I see online is to set your Material to Non-Tangent-Space and feed a (0,0,1) vector into the Normal channel but you'll soon find that this is only a Band-Aid solution. It only looks pleasant in very specific circumstances and falls apart completely when dealing with slopes/natural landscapes.

By making your grass blend perfectly with your landscape you can lower the overall density of the grass, saving performance!

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Computer Specs:
Ryzen 3900x 12-core CPU
MSI Geforce RTX 2080 Super
64GB Corsair RAM
One of those fancy nvme m.2 SSD's

Programs of choice:
Unreal Engine 4 - (Game Dev)
Blender 2.8 - (Animation and Modelling)
OBS - (Video/screen capture)
Davinci Resolve - (Video editing)
Adobe Photoshop - (Graphics and Texturing)
Quixel Mixer - (Texturing)
ProTools 11 - (Compositions and mixing)
OldSchool Runescape - (Chillax time)

Filmed using:
Sony A7s2 body
Sony 24-70mm f/2.8 GM lens
Yonguo YN360 LED's for colour
Yongnuo YN760 chip LED w/ Godox softbox for key

My lovely cats names are Boycat, Girlcat and Ladycat :)