texture and displace the floor using the Kaliset

[cKleinhuis]

here i am talking about what you can do inside a DE() method
<a href="https://www.youtube.com/v/pltkqEdxuzI&rel=1&fs=1&hd=1" target="_blank">https://www.youtube.com/v/pltkqEdxuzI&rel=1&fs=1&hd=1</a>

[Crist-JRoger]

Is that YOU? 
I don't know that when see this video before )

[Crist-JRoger]

Experiment with surface mapping. The garden of Kali`s trees and last DE-raytracer. I attached .frag file, but it's very resource-intensive (on gtx660 run 400x225)
Need to create single colormap for the Surface separately from main fractal. Surface needs debugging 

[cKleinhuis]

Is that YOU? 
I don't know that when see this video before )

sure, this is one of my alter egos in my show

[Crist-JRoger]

  I combined Terrain and Kaliset

[cKleinhuis]

wow, that tree gives the scene a strane sense of nature, looks cool!

[Patryk Kizny]

And in my version of the raytracer there is a global 'translate' tab which does exactly this (and a bit more).
There's a full affine transformation allowing you to translate/rotate/scale the space. Ax an extra there's also 1-axis twist, stereographic projection and an interseting space noise.

-- edit

That's a reply for the previous page questions

[Crist-JRoger]

@Patryk Kizny, i get your code with camera settings. Very easy to use.

So there is another settings of Terrain+Kaliset and attached script with presets. Maybe code is wrong, i think something works badly... but this script very interesting to create different landscapes  

[Patryk Kizny]

This looks awesome!

[Patryk Kizny]

And actually that could look even cooler if merged with the dirt effect from my latest raytracer update.

[Crist-JRoger]

Terrain+Kaliset. Global illumination

[Patryk Kizny]

I checked your frag and noticed you have some issues within the DE.
I am not sure what you meant there.

float DE(vec3 pos) {
   
   int i=0;
   for (i=0; i<Iterations; i++) {
      
      float h = height(pos);
      float k = Kaliset(pos);
      
      if (KTex) {orbitTrap=vec4(1,1,1,1)*(k*ColorScale+ColorOffset);}
      if (KHeightmap) {
                       float sc=k*Strength;
                       pos+=vec3(sc,sc,sc)*Strength2;}
      h += k;
      if (i<ColorIterations) orbitTrap = min(orbitTrap, abs(vec4(pos.xyz,expsmoothing)));
      
      
      return (pos.z-Slope*h);
   }
}

Since return is within the "for" loop it's actually never going through the loop cause it breaks the loop on return.
Also if KHeightmap is false, even if it did go through the loop, it wouldn't do much cause nothing changes there.
And Iterations is bound to both terrain and main loop, so I'd suggest adding another control for that. 5-6 its for terrain are sufficient and in your presets there were like 25-35 values which is an overkill even for my Titan X.
Finally you're nesting a lot of DE functions within a for loop which is a computational overkill (not sure if that's crucial for the intended result here).

So a proposed alternate:

#info Terrain
#include "MathUtils.frag"
#include "DE-kn9.frag"
#include "Classic-Noise.frag"
#group Terrain

// Number of differnt noise scales
uniform int Iterations;  slider[0,5,100]
uniform int mIterations;  slider[0,5,100]
uniform int ColorIterations;  slider[0,3,300]
uniform bool fromFloor; checkbox[true]
// Slope
uniform float terrSlope; slider[-5,-0.5,5]
uniform float kaliSlope; slider[-5,-0.5,5]

uniform float FreqMul; slider[1,2,10]
uniform float Offset; slider[0,0.4,1]
uniform float AmpMul; slider[0,0.3,1]

uniform float WaterLevel; slider[0.0,0.6,1]
uniform float S; slider[0,1,3]

float expsmoothing = 0.0;

float height(vec3 pos) {
   float A = 1.0;
   float B = 1.0;
   float r = 0.0;
   for (int j = 0; j < 5; j++) {
      r+= B*cnoise(A*(pos.xy)+Offset);
      A*=FreqMul;
      B*=AmpMul;
   }
   if (r>WaterLevel) r = WaterLevel;
   return r;
}

vec3 baseColor(vec3 pos, vec3 normal) {
   
   float h = height(pos);
   if (h==WaterLevel) return vec3(0.0,0.0,1.0);
   h = 1.0-clamp(h, 0.0, 1.0);
   if (h>0.5) return  vec3(h-0.5,1.0,h-0.5);
   if (h<0.5) return mix(vec3(0.0,0.0,1.0),vec3(0.0,1.0,0.0),h*2.0);
   
   
}

float DE(vec3 pos) {
   
   float h = height(pos);
   float k = Kaliset(pos);
   
   
   if (KHeightmap) {
      float sc=k*Strength;
      pos+=vec3(sc,sc,sc)*Strength2;
   }

   if (KTex) {
      orbitTrap=vec4(1,1,1,1)*(k*ColorScale+ColorOffset);
   } else {
      orbitTrap = min(orbitTrap, abs(vec4(pos.xyz,expsmoothing)));
   }

   float de = pos.z - (k * kaliSlope + h * terrSlope);
   return de;
}

[Crist-JRoger]

Wow! Your script quickly ) Thank you! As i say more times - i am not a programmer, i just open frag files, copy-paste code and see what happens.
If that possible, can you add this surface into raytracer? Maybe with 3 modes - terrain, kalitex, terrain+kalitex. I tried, but my videocard crash...
And problem that i had when played with this. All scene has color from kalitex (i like this color palette!). When you add other object to this scene - it has color from kalitex too. Need to create manually different colors or color schemes for surface and other objects. So now i just don't using orbit color )

[Patryk Kizny]

I did not check your changes to the ray tracer.
And did not study the color yet.
For sure you can add color by saving the final point coords into color, this can be easily added to ray tracer.
You can also implement color base color function after adding #define providescolor.
So there's a bunch of options that you could blend: height, orbit trap, map, coords, normal. Could be fun.
Adding multiple materials is tricky - would require lots of changes in the tracer. Good approach is already present in GI tracer. Would adapt it some day and integrate into mine.