Rhino 6: decal invisible on transparent material

Hi…,

I’ve tried to place an opaque decal (label) on an object with glas material (green bottle). But the decal is mysterious invisible. On the red opaque bottle is no problem.

Where to look? Here is the file: decal_gone_on_transparent_material.3dm (1.9 MB)

Thanks

Michael

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This is a known problem (at least RH-40934, but there are several reports open already). Decals on transparent and fully reflective materials disappear. For Raytraced it’ll be addressed when I get to implementing native decal support (i.e. no longer baking) - that can still be some time out, possible even not until Rhino WIP is on my list again.

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Ran into this problem today. Any word on this? An opaque label with a clear bottle seems like something very fundamental.

Decal improvements are possibly coming in Rhino 9.

But until then you can use Physically Based materials to get a similar effect of opaque label on clear bottle.

I have here a video how to do an embossed logo:

I have mentioned these techniques earlier here on Discourse, for instance Decal question - #3 by nathanletwory (and the topics linked to from that)

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Thanks Nathan!! I think I’ll review your video next time this comes up. I ended up making a surface for the backing of my label. That works find as long as the host object doesn’t change shape but I’d rather do what you did at least until R9.