Now tried it with the explanations in that link. It says, the first line of the NK is as follows: Number 1: 1=eV, 2=um, 3=1/cm, 4=nm. Indigo only supports 1=eV. Number 2: Lowest eV. Number 3: Highest eV. Number 4: Number of lines below that line. The NK file that I downloaded had the first column as...

Ok, found a description of the format:

http://people.csail.mit.edu/jaffer/Free ... ell_2.html

I think, I had a bit luck. I compared the NK that I downloaded with the NKs from Indigo. So I have seen, that the Indigo NKs had 2 columns where the downloaded one had three columns. But the Indigo NKs had that first line containing 4 numbers that were missing in the downloaded NK. So I just took th...

Thanks, SATtva, so here is the screenshot.

It uses the fe3o4.nk from the link that ZomB provided above. I changed it a bit to make it work in Indigo.

Can't attach NK extension... copy and paste: 1 2 5.5 100 0.96397 0.53633 0.98179 0.53994 0.99873 0.54191 1.01456 0.54244 1.02909 0.54172 1.04217 0.53998 1.05366 0.53744 1.06347 0.53436 1.07154 0.531 1.07786 0.5276 1.08243 0.52439 1.08528 0.52162 1.08644 0.51954 1.086 0.51833 1.08404 0.51825 1.08065 ...

I tried to compare the existing NK files with the NK file that I had downloaded. The differences: The downloaded NK files first column is the wavelength. That seems to be missing in all the NK files if indigo. There is some kind of header in the first row in the indigo NK files. It consist of 4 numb...

Danke

The rgbtonk sadly crashes when importing the NK with the complex IORs. I will have a look into the NK gallery, Thanks.

@ZomB: Thanks. That looks exactly to what I'm looking for. Is there any documentation about NK or how I could convert that to an Indigo NK? I tried to use the dat file from that site as NK, but it gives me the error you are talking about. I don't know how the file is built up, it looks like a table,...

Hi, I'm searching for a material that looks like blued steel. This is done by diving hot metal into oil. You get a surface which looks black, but has some blue reflections in it. I need it for the rendering of a hydraulic cylinders. Most pictures I found on the web are weapons, but maybe it helps: h...

I have problems with Blendigo: 1) I map the materials that I have defined in Blender in the Blendigo exporter. 2) Go back to Blender and edit the scene. I remove an object that has material that was mapped in Blendigo. 3) Go to Blendigo exporter and get a python error: ---------------------- BLENDIG...