Search found 2199 matches

by B.Y.O.B.
Wed Jun 26, 2019 3:30 am
Forum: Development
Topic: Transitioning from VRay to LuxCoreRender
Replies: 22
Views: 415

Re: Transitioning from VRay to LuxCoreRender

Now back to the "artificial light source" problem I mentioned in my original post. I finally solved it. First, I simply used "invisible to camera" (in Blender) but it still cast shadows and appears in the mirror as a white rectangle. Later I manually changed .visibility.indirect in the light object...
by B.Y.O.B.
Tue Jun 25, 2019 6:54 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 74
Views: 1096

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

I might have found a bug: This is a scene with metal material, roughness 0.1, glossiness threshold set to 0.2 so the glossy reflections of this material are handled by the light tracer. However it looks like the normal path tracer is also still tracing these reflections because they are very noisy. ...
by B.Y.O.B.
Tue Jun 25, 2019 6:21 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 74
Views: 1096

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

Ah ok, the default is 0, I assumed it to be 0.05 because of Dade's example.
by B.Y.O.B.
Tue Jun 25, 2019 6:18 pm
Forum: User Support
Topic: Node setup for volume absortion
Replies: 3
Views: 173

Re: Node setup for volume absortion

Sorry for the late reply. Something like the attached scene, I guess. But you will have to investigate how to input your wavelength values correctly, how to handle sRGB conversion etc., I can't help you there. Maybe use LuxCore's conversion function: https://github.com/LuxCoreRender/LuxCore/blob/781...
by B.Y.O.B.
Tue Jun 25, 2019 6:09 pm
Forum: Development
Topic: Transitioning from VRay to LuxCoreRender
Replies: 22
Views: 415

Re: Transitioning from VRay to LuxCoreRender

Volumes are not needed for marble (unless it is very thin and you need the SSS effect, for example on a statue). Anyway, the IOR in the glossy material is just a simple multiplicator for the specular color. It does not take the interior/exterior volume IOR into account. It can be used if you know th...
by B.Y.O.B.
Tue Jun 25, 2019 4:28 pm
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 74
Views: 1096

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

I could not get glossy caustics from Blender, so this feature is yet to be exposed? Check if your binary already includes the feature. I have not yet exposed the new "path.hybridbackforward.glossinessthreshold" parameter, but it will just use the default value, so it should already work in Blender.
by B.Y.O.B.
Tue Jun 25, 2019 4:25 pm
Forum: Development
Topic: Transitioning from VRay to LuxCoreRender
Replies: 22
Views: 415

Re: Transitioning from VRay to LuxCoreRender

Can you show your result, and your expected output (Vray result) for comparison? Without images it's hard to guess what might be wrong.

Here's my result (10 s + denoised)
by B.Y.O.B.
Tue Jun 25, 2019 3:43 pm
Forum: Development
Topic: Transitioning from VRay to LuxCoreRender
Replies: 22
Views: 415

Re: Transitioning from VRay to LuxCoreRender

I would use a glossy material with lowest roughness (around 0.001).
The rest comes down to having the right diffuse textures. Do you have image textures or do you want to do them procedurally?
by B.Y.O.B.
Tue Jun 25, 2019 10:20 am
Forum: Development
Topic: BlendLuxCore Development
Replies: 561
Views: 61067

Re: BlendLuxCore Development

I have considered this in the past, but I decided against it for these reasons: - unavailable settings are usually unavailable for a reason. For example, BidirVM is broken. - if the user is advanced enough to decide he can handle such hidden settings, I assume he is also advanced enough to go into t...
by B.Y.O.B.
Tue Jun 25, 2019 10:12 am
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 74
Views: 1096

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

I have exposed this feature in BlendLuxCore.
If OpenCL is used, the CPU is completely dedicated to light tracing automatically.
If only the CPU is used, the user can control the amount of computing power to spend on light rays (default: 20%).