BlendLuxCore Development

[Sharlybg]

Yes it's something I wanted to do for a very long time.

Can we also expect that update directly inside blender addon manager will update both blendluxcore and luxcore ?

[B.Y.O.B.]

Can we also expect that update directly inside blender addon manager will update both blendluxcore and luxcore ?

Umm yes everything else would be stupid, right?
But the auto update button is still far away.

@Dade: I'm trying to use SetFromString() on a properties object, but it's failing with

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RuntimeError: Syntax error in a Properties at line 2

Can you tell me what's wrong?
My Python code:

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    props = pyluxcore.Properties()
    props.SetFromString("""
        # The slight offset is there to avoid floating point precision issues
        # with objects that are exactly at world center, e.g. "cube on a plane scene"
        
        # Dark subgrid (10cm blocks)
        scene.textures.grid_10cm_1.type = "checkerboard3d"
        scene.textures.grid_10cm_1.texture1 = 0.3 0.3 0.3
        scene.textures.grid_10cm_1.texture2 = 0.4 0.4 0.4
        scene.textures.grid_10cm_1.mapping.type = "globalmapping3d"
        scene.textures.grid_10cm_1.mapping.transformation = 10 0 0 0 0 10 0 0 0 0 10 0 0.001 0.001 0.001 1
        
        # Light subgrid (10cm blocks)
        scene.textures.grid_10cm_2.type = "checkerboard3d"
        scene.textures.grid_10cm_2.texture1 = 0.4 0.4 0.4
        scene.textures.grid_10cm_2.texture2 = 0.5 0.5 0.5
        scene.textures.grid_10cm_2.mapping.type = "globalmapping3d"
        scene.textures.grid_10cm_2.mapping.transformation = 10 0 0 0 0 10 0 0 0 0 10 0 0.001 0.001 0.001 1
        
        # Big grid (1m blocks)
        scene.textures.grid_1m.type = "checkerboard3d"
        scene.textures.grid_1m.texture1 = "grid_10cm_1"
        scene.textures.grid_1m.texture2 = "grid_10cm_2"
        scene.textures.grid_1m.mapping.type = "globalmapping3d"
        scene.textures.grid_1m.mapping.transformation = 1 0 0 0 0 1 0 0 0 0 1 0 0.001 0.001 0.001 1
        
        # Material
        scene.materials.{mat_name}.type = "matte"
        scene.materials.{mat_name}.kd = grid_1m
    """.format(mat_name=luxcore_name))

[Dade]

@Dade: I'm trying to use SetFromString() on a properties object, but it's failing with

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RuntimeError: Syntax error in a Properties at line 2

The spaces/tabs before the "#' char. Comments must have a "#" as first char of the line at the moment. I will add a trim() to let the parser be a bit more flexible. In the mean team, just remove the spaces/tabs as workaround.

[B.Y.O.B.]

Ok thanks!

New fallback material for objects without material:

[Sharlybg]

After playing a bit arround i think the new light/world setting are a bit too confusing .

#1 Now we need to control sun separetly from sky in two defferent panel it can easily lead to lighting error scenario and misunderstanding

#2 I also think like in the past that the possibility for luxcore to set HDRi map by Hemi Lamp was far better than cycles generic HDR. It give great flexibility and simplicity. you can have many different hdri (day /night /cloudy) in your scene and easily manage them using layers or on/off gain individually. And now the fact to have a generic HDR system in world panel can add confusion. i've already work for hours with defferent HDR map in the same system without noticed it

I think old system was just rigth, maybe we can improve it but it is a good base. just suggestion this how i feel it.

[B.Y.O.B.]

Thanks for your feedback, I'll think about it.

#2 I also think like in the past that the possibility for luxcore to set HDRi map by Hemi Lamp was far better than cycles generic HDR. It give great flexibility and simplicity. you can have many different hdri (day /night /cloudy) in your scene and easily manage them using layers or on/off gain individually.

You can still do that. Set the world light to "None" and only use hemi lamps with HDRI.

And now the fact to have a generic HDR system in world panel can add confusion. i've already work for hours with defferent HDR map in the same system without noticed it

I had something similar happen to me, too. The world and light controls just look very alike.
Have to think about if I can improve this somehow.

[Sharlybg]

You can still do that. Set the world light to "None" and only use hemi lamps with HDRI.

This is the problem, world light have to be set to none first and the additional gymnastic add unnecessary potential confusion.

[Dade]

It was one of them.
Now only one is left I think:

I have a scene where a camera and a green sphere are moving at equal speed to the left.
In the background are some white cubes on a red plane.
I use both camera and object motion blur.

When I use shutter = 1.0, everything works as expected (green sphere is sharp because it has equal speed with camera, background is blurred).
But when I use any other shutter value, the green sphere is blurred as well.

I should have fixed the problem (pull both LuxCore and BlendLuxCore).

Did I ?

[acasta69]

Just a thought: what do you think about increasing the statistics available in the render window once the render is stopped (if it is possible without too much work)?
During render we can see a lot of data, but after stopping we are left with memory usage and time.
For example the number of samples per pixel could also be nice to know, especially if time has been used as a halt condition...

[B.Y.O.B.]

I would love to, but as far as I know Blender does not let us do this.
However, maybe we can later find a workaround, e.g. have a panel similar to the error log.
I would also like to have one of these info blocks for each rendered image slot, for better comparisons.
As always: if you don't want me to forget about it, make a github issue.

by the way, related, sadly was not implemented yet: https://developer.blender.org/T49101