I am in a mixed pipeline. Maya, Houdini, Flame, Nuke. Renderers are Maya Mental Ray, Vray. Mantra on Houdini only, but all renderings are done through Maya and we are using Alembic as an exchange, which is working great. Thank you SESI and Autodesk, also Imageworks and ILM.

I having trouble bringing in EXR 16 bit floating point files into COP. The alpha channell is unrecognized and FileIN COP reports a file error. Image sequences are out of Maya Mental Ray and Vray. EXRs out of Mantra are OK. I tried uncompressed, default, and RLE compression settings. Here is the weird part. If I just QC the sequence using MPLAY it loads the sequence correctly, except that A is not identified , only C is available. But if alpha button is pressed on the bottom of MPLAY it displays the alpha. I suspect that COPs are reading the alpha , but not as alpha but as an extended ‘deep’ raster. Nuke reads the file EXRs just fine.