Since povray version 3.7.beta.8 support for EXR file format has been added using OpenEXR library. If the openexr library is installed during emerge of povray it gets detected by configure and support is automatically added. But openexr is no dependency of povray. If you remove openexr later or install povray as binary package on a different computer without openexr, then povray will be broken. The attached patch adds explicit handling for openexr by using USE variable openexr. The ebuild has been testet on amd64 with USE="-openexr" and USE="openexr". Reproducible: Always
Created attachment 209893 [details, diff] patch for added explicit support for openexr
There were a couple more automagics. Fixed in latest beta.