Multicolor printing - OBJ export issue

Grasshopper ShapeDiver
1

Hi! I’m trying to export my mesh model including colors so 3D print slicers can read the color. Best I got so far is using the ‘mesh colour’ component and then exporting as OBJ. There is just one issue: the OBJ information is saved with RGB values, but slicers like bambulab read float numbers. This means the slicer shows the wrong colors.

Example:

  • v -5.0 -8.3 0 156 216 137 should be v -5.0 -8.3 0 0.223529 0.698039 0.078431

In other words, each R, G and B value should be divided by 255 to get normalized numbers.

Is this (normalizing numbers) something that can be added as an option to the shapediver component ‘OBJ export options’?

2

There seems to be a new option to switch between 0-255 and 0-1 space in Rhino 8. I added your request to our list so we can include it in a future plugin release. I will let you know once we make progress about this topic.

3

Hi Mathieu, that sounds great! Thanks. It may sound like just a small thing but it would be incredibely helpful for me!