Search found 36 matches

by lion
Mon Sep 14, 2015 11:52 pm
Forum: Visuals
Topic: OpenSource Brigade 2 alternative?
Replies: 1
Views: 3590

OpenSource Brigade 2 alternative?

I'm still working on opensource B2 alternative, almost ready to provide sources. May be someone already did this? :D Here some example render of abouttime scene: YD26DXuFI4o Currently it uses glsl because CUDA can't run on AMD, and Nvidia do not support OpenCL 2.0, so bindless textures is the only w...
by lion
Sat Nov 29, 2014 10:24 am
Forum: Tools, Demos & Sources
Topic: Direct Light Integration using MIS
Replies: 11
Views: 8629

Re: Direct Light Integration using MIS

Very nice, small and understandable source)
by lion
Sun Jul 06, 2014 12:52 pm
Forum: General Development
Topic: Realtime Raytracing on an already busy CPU?
Replies: 8
Views: 3312

Re: Realtime Raytracing on an already busy CPU?

if I understood correctly they focus on photo-realistic rendering. They split render in two parts, photo-realistic render is other part http://embree.github.io/renderer.html http://embree.github.io/ do only ray traversal and basic shading. And how static nodes fragmented with dynamic ones? I assume...
by lion
Sat Jul 05, 2014 7:07 pm
Forum: General Development
Topic: Realtime Raytracing on an already busy CPU?
Replies: 8
Views: 3312

Re: Realtime Raytracing on an already busy CPU?

For CPU render try http://embree.github.io/
How you organize your octree? It's single OCL buffer?
by lion
Thu Feb 27, 2014 11:01 am
Forum: General Development
Topic: Implementing a Shader System
Replies: 13
Views: 6658

Re: Implementing a Shader System

papaboo wrote:If one of your rays do something dumb, then they can crash your entire driver, making debugging a nightmare


Ha-ha, I face it many times =) I even fail to make Intel OpenCL debugging, breakpoints is set, but just do not works.
by lion
Wed Feb 26, 2014 9:23 pm
Forum: General Development
Topic: Implementing a Shader System
Replies: 13
Views: 6658

Re: Implementing a Shader System

Try this lessons: http://www.scratchapixel.com/lessons/3d ... adiometry/

Also try Intel ispc or OpenCL as alternative to raw SSE.
by lion
Tue Feb 25, 2014 8:05 pm
Forum: GPU
Topic: Secondary diffuse bounce much more slower
Replies: 4
Views: 2933

Re: Secondary diffuse bounce much more slower

Thanks again for the link, I've found why http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ only 2..2.5x slower: RayGen.cpp->RayGen::randomReflection simulates numSamples diffuse rays from same origin, not real diffuse path segments. I compare it in similar condition - ...
by lion
Sun Feb 23, 2014 5:31 pm
Forum: GPU
Topic: Secondary diffuse bounce much more slower
Replies: 4
Views: 2933

Re: Secondary diffuse bounce much more slower

Dietger , no, I didn't seen this, thanks. May be it's because of shading, GPU-Z shows 98% CPU load and 10% memory controller load, also it's scene dependent, and even point of view dependent. Event 2.5x already reason to think, we do not need much precise for secondary diffuse bounce, so we can acc...
by lion
Sun Feb 23, 2014 11:34 am
Forum: GPU
Topic: Secondary diffuse bounce much more slower
Replies: 4
Views: 2933

Secondary diffuse bounce much more slower

I've notice that secondary diffuse bounce + sunray around ~5 times slower than primary diffuse hit + sunray (complex scenes, 1xGTX680). Probably because of rays coherency and cache. Is it normal situation or I do something wrong? If it's true question what to do with it... I have in mind use SVO or ...
by lion
Thu Feb 13, 2014 7:26 pm
Forum: General Development
Topic: Hair intersection : approaches ?
Replies: 16
Views: 8375

Re: Hair intersection : approaches ?

https://www.shadertoy.com/view/ldsGWB
Here example of complex "not triangle" intersection test.

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