Gradient Hatch technical testing

Hi @stevebaer,

Blend modes are something that I heavily rely on when I fine-tune my drawings in Illustrator. I’ve attached a simple example, that illustrates the difference between normal transparency and multiply in order to get a “realistic” cast shadow effect.

I know this example is a very basic one but it’ll open a complete new world of possibilities. If you are willing to implement this feature and if you need more examples just let me know and I will
prepare a more in depth explanation .




I did some research and prototyping on this topic over the weekend and it looks like we may be able to do this (no promises).


Thanks for trying!

Another idea


Cool! But what about Hatch join ,union, subtract and trim? Are they already there?Cuz this is the feature requested like since 2010!

It seems like we have all of the capabilities covered in that video unless I’m missing something.

That is a different topic and is currently being tracked at

Not sure if I have the settings incorrect as when I go to print a pdf, the transparency is not converted to the pdf file. Rhino PDF will lose all gradient and transparency information and other PDF export options will maintain the gradient yet will convert to a bitmap image (under vector linework) that has lost the transparency.

We are working on properly supporting transparencies in vector output for hatches. This is on my list of bugs to tackle for V7 at

This is really great & gets me thinking of interactive highlighting of areas in a gentle soft transformation.
Keep it up. Peace

There’s now a Gradient Hatch GH component in the Rhino WIP: RH-54752 is fixed in the latest WIP

Hi Steve,
Are you still positive about integrating transparency blending modes for hatches in V7?


Can gradient hatching come now to Rhino V6.0, as a plug-in? This is a very useful tool and cannot wait for V7.0. The examples look excellent.

Hi - this feature will not appear in Rhino 6, no. If you are a Rhino 6 user, you can download and use the Rhino 7 WIP right now.

two things I noticed: I can’t seem to bake these hatches and the component not only shows the gradient hatch but also an outline. how to turn this off?:

Thanks @Gijs this is logged as

What do you propose as a solution? If gradient hatches never draw their boundaries, then you also won’t be able to see them get selected - at least given GH’s current selection preview mechanism.

I can imagine having a right-click option on the GradientHatch component that would allow disabling boundary preview.

Thinking out loud here…

Maybe override visibility for outlines for hatches, only showing the outlines when selecting the component. I can’t think of a reason why one would want the hatch outline to be visible because it influences the look of it severely.

Edit: how about the baking issue?

A possible example of the outline being beneficial is if the hatch pattern is not solid and becomes large enough that the fill isn’t recognizable then the hatch essentially becomes invisible.

An outline option for the grasshopper component should be a good solution.


@Trav the gradient hatch component gets fed by those boundary curves in the first place, so it’s just redundant info imo. But an outline option will do (hopefully defaulted to false :slight_smile: )


That’s a good point. The upstream component(s) could provide the boundary preview. Maybe @DavidRutten will be satisfied with having no boundaries at all for gradient hatches.

I missed the baking issue… it’s here:

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Is the transparency of hatch already in WIP version? Specifically WIP on Mac. I can´t see it :slight_smile: