@John.Hygelund 

Just a quick thought. Could you break the CAD part outside OpticStudio and have multiple CAD objects with max. 50 faces in OpticStudio?

Take care,

David

@John.Hygelund:

If you are only interested in modeling target absorption and don’t need the reflection from the chrome, then perhaps you can avoid a CAD object all together and just use a slide object?  Presumably you can adjust the gray scale values of the attenuating pixels to match the OD of your mask.  One slide object can yield 8-bit intensity modulation (i.e., OD 2.4).  Two adjacent slide objects can provide 16-bit modulation (i.e., OD 4.8), which should be good enough to simulate chrome-on-glass. 

Here is a simple 2 x 2 pixel mask (PNG format) that I generated in Matlab.

Just a thought…

Regards,

Jeff

@Jeff.Wilde ,

Thanks for your suggestion. I should have mentioned that I’ve currently implemented this via a ‘slide’, but I wanted to model the reflections and validate the CAD geometry (from which the actual target will be produced). 

The slide object is very powerful and I use it frequently, but I hadn’t thought about doubling it up. Thanks for that idea!

@David.Nguyen ,

Good idea, that worked. Thanks!

Hi,

A little late as you already have an answer, but you can also group the surfaces (the individual geometrical element) per properties in something like 4 faces (entities sharing the same properties) only in your object: edge, back face, front transparent and front black.

Select using the object viewer and then change the face number to faces 0-3.

@Ray , thanks for your idea. I didn’t try that, but I will next time.