Mike Abbott

gunjack
Since my Arnold subscription has just expired I was about to ditch Arnold for Karma. I did some tests and Karma really looks impressive. However I hit the wall already on the first project.

1. I am getting black edges even on most basic refractive object regardless of the amount of refraction limit setting. There really should be an option for rays to "exit into background" when limit is reached otherwise the glass looks odd. Thin walled option is not a solution to this issue.

I'm also struggling with the lack of an 'exit to background' option. I have glassware and cannot get rid of black areas in certain parts, no matter what limits I set.

I think there's a good chance this is caused by numeric precision limitations. If you look up the Boolean help card you'll find a section about half way down the page talking about 'precision issues'. Read the bullet points immediately above too. There is also a section talking about 'collapse tiny seam edges' - read that as well. Hopefully that info will point you to a solution.

You could try a 'clean' or 'Polydoctor' SOP - but 'fine tuning' the first boolean to give you the best geometry would be the preferred option.

mzigaib
...a matter of Sidefx to know that this needs attention and I hope they see this.

No need to 'hope'. Please take 5 mins to fill in the form - with links to this thread and as above. Then they will see it - and we might see some action.

www.sidefx.com/bugs/submit [www.sidefx.com]