Search found 2025 matches

by Dade
Mon Jun 24, 2019 10:15 am
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

I should have fixed the visibility of infinite lights (and in general of light sources hit by eye paths). Important note: because Hybrid Back/Forward path tracing has still a strong path tracing component, it is often useful to disable the light visibility in specular paths to avoid many fireflies. ...
by Dade
Mon Jun 24, 2019 10:02 am
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

B.Y.O.B. wrote:
Mon Jun 24, 2019 8:15 am
Which depth (amount of bounces) is used for light paths?
The same of eye paths (so the max. "Eye <=> Light" path length is the same).
by Dade
Mon Jun 24, 2019 7:57 am
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

Does the hybrid rendering concept keep the physics base? Yes, it is unbiased and consistent. It is just a different type of Bidirectional Path tracing. Is energy conservation given during the rendering process? Yes. Does the hybrid option allow light paths meeting somewhere on track between light s...
by Dade
Mon Jun 24, 2019 7:49 am
Forum: Development
Topic: Transitioning from VRay to LuxCoreRender
Replies: 8
Views: 216

Re: Transitioning from VRay to LuxCoreRender

So my question is: in LuxCore, is it recommended to always use non-tiled (PATHCPU or PATHOCL)? Yes, progressive rendering is mandatory for some feature (Metropolis sampler, Bidirectional path tracing, etc.) and offers better adaptive rendering, etc. Any situation that we MIGHT need tiled? If, and o...
by Dade
Sun Jun 23, 2019 9:58 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

lacilaci wrote:
Sun Jun 23, 2019 7:31 pm
So, environment cache won't make it into 2.2?
It will (if it works well).
by Dade
Sun Jun 23, 2019 7:16 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

Dade, did you see my question on the last page? One question: does it make sense to use this for CPU-only rendering, or will Bidir still win there? Hybrid is a LOT faster than BiDir in term of samples/sec (it traces a lot less rays). BiDir samples may have less noise. The answer is in the "may have...
by Dade
Sun Jun 23, 2019 7:13 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

epilectrolytics wrote:
Sun Jun 23, 2019 7:03 pm
Looks like infinite lights are not supported yet and unlike BiDir no caustics are rendered in the water.
I have probably forgotten something, I will check.
by Dade
Sun Jun 23, 2019 5:34 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

B.Y.O.B. wrote:
Sun Jun 23, 2019 4:42 pm
Some quick tests.
In your rendering I see a bug I need to fix: "ES*L" paths (eye => any number of only specular bounces => light are not rendered at the moment in Hybrid Back/Forward).
by Dade
Sun Jun 23, 2019 5:31 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

So let's say in theory, I could make a glass house (true thick geometry) and use caustics with it. and if I could at the same time disable shadows for glass for pathtracer I could get near perfect simulation with true glass and excellent performance... Like: glass visible for lighttracer(caustics) ...
by Dade
Sun Jun 23, 2019 5:29 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 627

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

I was surprised to see that the hybrid method can be used in addition to the caustic cache (middle image). However it is probably not intended, since the render seems incorrect to me (brighter caustics). Yes, you can (I want to remove caustic cache) but it doesn't make sense because you are computi...