Grass Shader

[SpiderPig]

First attempt at grass in Ultra.  Lighting needs work still, but not too bad.

 

[SpiderPig]

Needs some better noise maps for position and rotation I think

[SpiderPig]

That's better.

[SpiderPig]

I wonder what causes this in PBR lighting... my normals and world positions are passed to the fragment shader properly, but do I need tex_coords too? 

[Josh]

You don't need texcoords unless you are using normal maps.

[SpiderPig]

Thanks, I didn't think so.  I must be passing something wrong.

[SpiderPig]

Half my grass was actually below the ground.   Now it looks better and I gave it some rough animation.  I've also made it that the root of the grass blades are darker.  Still needs a lot of work but I'm done for now I think.  I can fine tune it later.

[SpiderPig]

Better!

[SpiderPig]

Changing the material roughness made it look 10x better.  I'm happy with the lighting now.

[Alienhead]

This is some cool looking grass..  I always love cool grass and environment stuff in games.

[SpiderPig]

Yeah me too.  I think the thing that really makes the grass pop is the sort of ambient occlusion where I make the roots darker than the tips.  I'll post a before and after pic later.

[Alienhead]

17 minutes ago, SpiderPig said:

Yeah me too.  I think the thing that really makes the grass pop is the sort of ambient occlusion where I make the roots darker than the tips.  I'll post a before and after pic later.

You are soooo right about that.

Notice   fake ambient on grass

[SpiderPig]

Is your grass there a geometry shader or part of Leadwerks vegetation system?  AO really does sell the depth of things. 

Before AO

After AO

[Alienhead]

2 hours ago, SpiderPig said:

Is your grass there a geometry shader or part of Leadwerks vegetation system?  AO really does sell the depth of things. 

That's the LE vegetation shader with some custom modifications made to it.