I had an old material (metal mesh) applied to a surface with a mapping that I don’t recall how it was done (first from the left). But it achieved that no matter how I rotated the surface the mapping was always normal to the surface. I was able to reproduce this in a physically based material to be …

I don’t know why yet, but for the two surfaces that Raytrace black add a surface mapping as well. The texture will still be using the OCS mapping, maybe a logic error somewhere in handling the mappings. At the moment I don’t see yet where or how because the surfaces to the left work just fine.

Well, apparently it happens when Anisotropy is added to the mix. As soon as this is added the material turns black when the OCS mapping applied. Does that help? N

Right, that might make sense and why adding surface mapping helps, but I’d have to deep into the code to exactly see how the tangents are set up for anisotropy. edit: indeed it looks like that. Since no texture mapping channel exists there is no uv-data being sent to Cycles. OCS mapping isn’t a (uv…

For my purposes, right now, I can live without the anisotropy on the mesh. But maybe something keep an eye on. While on this model, I noticed that: . the bump has very little effect, is that correct? . the displacement texture seems not to tile, is that correct? Thanks, N

[image] nsgma: the bump has very little effect, is that correct? Could be. BumpStrengthFactor and BumpDistance are advanced settings you can increase to get better effect. [image] nsgma: the displacement texture seems not to tile, is that correct? I don’t see Physically Based material…

Actually, for the material 41Alum_1011 (1.1) noise texture the octave settings is too high. With 8 octaves the noise is hardly discernable: [8 octaves] [6 octaves] [5 octaves] You probably want to lower both octave count and frequency multiplier, even amplitude multiplier.

I have a fix for the black object. It should be available next week in 8.15 SRC.

[image] Nathan 'jesterKing' Letwory: are advanced settings you can increase Where are these advanced settings? [image] Nathan 'jesterKing' Letwory: I don’t see Physically Based materials with displacement? yes, I was playing with that after sending the file. I noticed that the displac…

The noise bump map,was a way I found to add a bit “noisy shimmering” to the surface reflections. Less noticeable on the flat, more on curved surfaces. There’s probably easier ways. below the one on the right does not have the noisy bump map. [image] Thanks, N

Displacement through a material needs (dense) geometry. Set a custom mesh for your plane with settings that give dense enough geometry: [image] [image] nsgma: [Note also that when you change displacement most times you need to exit raytraced display mode and return to see the effect. it does …

Mapping Material Behaving strangely

Rendering

brian (Brian Gillespie) June 3, 2025, 10:06pm 13

RH-62873 is fixed in Rhino WIP

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Mapping Material Behaving strangely

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