Make surface have the feature of b/w bitmap

Rhino Rhino for Windows
1

Hi all!

I am working on a model and may want to let the surface has the similar features as the attached bitmap. But instead of using bitmap as the render material, I want to make the white part of bitmap be the solid part on surface and black becomes void.

Is there any way to achieve such effect? Do I need to use grasshopper?

Really thanks!!

Capture|303x165

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Capture

3

Please don’t double post:

https://discourse.mcneel.com/t/make-surface-have-the-feature-of-b-w-bitmap/80941

4

Really sorry for the inconvenience. You can delete the one in grasshopper section.

5

You have the permission to delete your posts (I don’t).

For your information: If you happen to use wrong tag, you can modify the tags and titles of your onw posts.

// Rolf

6

Hello - using the image as a transparency map on the material will make the surface look like it has voids.

Voids.3dm (421.5 KB)

-Pascal

7

Can anyone help me?

8

have you tired with what Pascal says? use the texture as opacity map?

9

Hi, thanks for your answer. Though your approach can achieve that effect visually, I want to get the surface to be that (void means real hole) since I need to print it out later.

10

I know that approach, use bitmap to attach to model like render material. But I want to get the surface to be exactly look like that way (void means real hole) since I need to print it out after the modeling process.

11

Hello - in that case I guess you’ll need to trace the bitmap and then split the surface

A cheap way out would be to

  1. Create a Heightfield from the image - fairly tall
  2. Section just above the flat part
  3. Trim a plane with the resulting curves.

-Pascal

1 Like
12

in case that the final surface is not planar, you can flow or pull the traced bitmap and then split the tarjet surface