Using the custom preview, I’d like to control transparency of objects to see, in this case, a boolean intersection which I purposely display opaque with a flashy color. But the transparency is kind of shitty and hides the opaque object. Could that be improved ? Also, is there a component somewhre…

Have you tried looking at it in Ghosted?

it looks like the order of the way you connect them is important… bug? [image] order.gh (10.3 KB) edit: what’s even more weird: you can select the custom preview you want to be in the background and cut/paste it on the canvas to change the display order

[image] Gijs: it looks like the order of the way you connect them is important… bug? The order does matter, its not a bug. In an OpenGL like drawing pipeline, transparent objects must be drawn back to front. This is because the depth buffer cannot possibly deal with transparency as a concept.…

[image] DavidRutten: This is why Rhino, when it must draw transparent objects, always sorts all shapes back to front prior to drawing them. This has to be super-stressful on the system when orbiting around a model : Rhino keeps shuffling the objects list… Given the power of recent “RTX” grap…

[image] osuire: This has to be super-stressful on the system when orbiting around a model : Rhino keeps shuffling the objects list… Well it only has to sort the display order. Not the actual object data in memory. Maaaaybe the best of the best of modern graphics cards could run a full screen…

[image] DavidRutten: Ultimately, way in the future, it is likely that display is indeed based on raytracing and path-tracing This is today… "NVIDIA Marbles at Night RTX is a fully playable physics-based game. It is entirely ray traced with NVIDIA DLSS integrated. It is powered by NVIDIA’s O…

1440p is very impressive. But I have two 5k screens, and I sort of like it when my fans aren’t running full-on all the time. We’re definitely getting there, and maybe in 10~20 years most of our customers will have the hardware to be able to run such a display pipeline. We of course already have real…

[image] DavidRutten: We of course already have real time cycles as a display mode, so at least we’re out of the starting blocks. My suggestion was to create a watered-down version of that, trading realism for faster ray-tracing. And if you don’t like the noise, use a de-noiser (opportunistic…

@DavidRutten thanks for the explanations!

[image] DavidRutten: But I have two 5k screens Could you give us the specs. of your setup ; screens, desktop ? Let me guess : it has to be a mac because you need to test both Win and Mac versions. The latest Mac pro perhaps, and two Pro Display XDR … Close ? No answer counts as “yes” …

Transparency of GH objects is ...not transparent

Grasshopper

kike (Kike Garcia) February 13, 2025, 8:05pm 15

Hi @osuire,

There is a new ‘Custom Preview’ component in Rhino 9 that does not care about object order.

The component is hidden by now but you can try it typing #Custom Preview (WIP) on the canvas.

Issue with the Boundary option of Custom Preview Components

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Transparency of GH objects is ...not transparent

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