Simple PathTracer with volumectic light

[3dickulus]

@CJR off topic but here's a tip

When using textures the defaults are usually ok but there are options for tweaking how textures are handled...

min = 1.0 = no filter
max = 16.0

this pic is labeled as subframes.anisotropy


so for better quality....

Code:

uniform sampler2D DeTex; file[texture.jpg]
#TexParameter DeTex GL_TEXTURE_MAX_LEVEL 1000
#TexParameter DeTex GL_TEXTURE_WRAP_S GL_REPEAT
#TexParameter DeTex GL_TEXTURE_WRAP_T GL_REPEAT
#TexParameter DeTex GL_TEXTURE_MAG_FILTER GL_LINEAR
#TexParameter DeTex GL_TEXTURE_MIN_FILTER GL_LINEAR_MIPMAP_LINEAR
#TexParameter DeTex GL_TEXTURE_MAX_ANISOTROPY 16

Why so many lines to get one thing done? when user specifies a texture parameter the defaults are not used so user must specify all parameters.

[Crist-JRoger]

I was also playing with rand wanghash stuff to see if it could resolve faster, cleaned up a little bit of code re:MathUtils.frag , seems to work?

As you wish. I just want add all rands funcrions into one place.
For now i trying add speculars... any help? 

[Crist-JRoger]

ok, some specs... but looks not so good as I wish    The sun looks like little flashlight. Somrthing wrong in code  
Attached zip with fragments.
 

[3dickulus]

just testing with mandelbulb formula, I find that high iterations of MB cause black dots so clamp is needed   as in...

Code:

if(UseTexture)surfaceColor+=clamp(texcube(DeTex, pos*DeTexScale, nor ).xyz,0.0,1.0)*DeTexExposure;

imho : specular-ness results from surface hardness and surface reflectivness so if the math is right Material->Refl and Material->ReflExp should effectively create a specular surface

Edit: added burning-bulb, seems specular to me?

[Crist-JRoger]

Too small renders! 
Reflect is reflect, specular is specular. Do not confuse. When refl parameter is too high, I agree, it looks like specs. But material like metal could not be reflected (in certain cases) and could has high spec patameter with hith specExp. For example, brushed stainless steel.
And all of that gives more properties of material.

Black dots... yes, need check on hard fractal or hard settings with a lot of iterations or high detail...

[Sabine]

@Crist-JRoger Here too!! Tested your latest version, and get lots of black or white dots again (and they were so nicely vanished with the clamp added in ln 178!)  
When I replaced your newest raytracer version with previous in the zip you posted up here, dots are gone

[Sabine]

  This pathtracer is fantastic! Whatever I try with it looks much better than before

[Crist-JRoger]

I'm very glad )
So, fractals with Kali's palette coloring will looks interesting i think    Need to try it 
Now i play with SunSky, and it's most beautiful renderer for Fragmentarium. Fixed some black dots on my Radeon. Maybe it deserves new topic...

[Sabine]

yesyes, new topic:) I will try it here too, let's see what sunsky does on nvidia But I hope you will also keep looking at newiqpath?

[Crist-JRoger]

I'll do my best 
Recently i noticed (among other things) that SunSky renderer has perfect shadow code. I dreamed about this  here
Now how it looks in SunSky, very realistic shadow blur

[Sabine]

 

Ohh yes, I remember you asking how that could be done with these realistic shadows! Very cool!
This weekend I will try sunsky:)

And I am glad you won't forget the wonderful newiqpath!

[Tim Emit]

Great work on this Crist ... Lovely images all. Only managed to have a quick peek but it looks very useable look forward to trying it out ..thanks as ever : )

[Crist-JRoger]

Good render Tim!
Now I tested some closed fraclal scenes without any sky or spotlight access inside. So too dark! Need some CamLight or Abmient light inside the odject.
This renderer takes light only from background and spot light. Too bad I think. I have no idea how add camlight and save AO 

[Tim Emit]

thanks Crist..yes only light from outside so very dark interior, only a little light seeping in and at such an intensity as to almost burns : ) .. but still a very nice effect.

[Crist-JRoger]

Attached new frags to 1st post. Updates:
- added floor with rotate
- added materials for every object like GI, see vec2 map(in vec3 z) function
- better de and shadows
- separate colors for background and ambience