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atrodler

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Reply with quote  #1 
experiment number 3.
I preformed the first two grass texture tests on a flat ground plane. Probably works for many but in my world, nothing is ever flat. The question then, can we utilize the same technique on models with terrain.

Here's what I did.

An existing model, I wanted to generate a image looking this way.
grass test 1.jpg 
I extracted the grass area into a separate model, just to keep it simple.
grass test 2.jpg 
I created the grass texture array exactly the same way, on a flat plane, positioned directly above where I wanted the end result to be. grass texture is scaled at a 3:1 L:W ratio, then scaled to fit the scene, and then arranged to correspond with my POV.
grass test 3.jpg 
close up
grass test 3a.jpg 
Here's where the added steps begin. The line work for the array has to be draped, or extruded with faces intersected on to the terrain in the model.
grass test 4.jpg 
Each segment 'piece of the pie' in the array has to be set to projected, and each of those segments needs to be projected individually down on to the terrain.
grass test 5.jpg 
back to the model
grass test 6.jpg 
raw render looks like this. (saved as a jpeg)
grass test terrain 2 raw.jpg 
my final looks like this.
grass test terrain 2.jpg 
experiment 3 complete.[thumb]



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arqcova

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Reply with quote  #2 

Very well executed experiment!

 

the edge on the lake vs the grass was edited on PSD using a special brush? or what's the technique?  [eek]


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bigstick

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Reply with quote  #3 
Instancing is coming [wink]
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arqcova

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Excellent news bigstick! [thumb][comp]
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atrodler

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Grass on the edge of the lake is a PSD brush. Correct. Search for grass brushes. There are a bunch. I found one with about 30 different brushes in one ABR file. Then I simply rubber stamp from various places on the image in a series of layers and then adjust the colors a bit. I use the brush menu (not sure what the name of the menu is) where I add scaling, jitter, scattering. Etc.

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atrodler

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Reply with quote  #6 
Quote:
Originally Posted by bigstick
Instancing is coming [wink]


I'm ready!

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