Are you doing anything special with Render Setup for layers or AOVs that would dis-include this model from the render? Does the material maybe pull transparency from the texture? I've come across similar effects when it comes to objects that have multiple per-face material assignments. I have a thread about that, but…
So, The issue i'm having this morning is really strange - I've basically been updating some texture maps in photoshop and then adjusting some colours in Maya for a model i'm working on (this is a learning project - i'm still learning). I rendered everything fine in Arnold using Arnold renderview....IPR working fine all…