I am having a problem with Visualize 2017. When I apply a PNG decal to my model, the transparent area of the image cuts through my model's surface, showing what's below. I tried using a TIFF decal and the problem persists. The problem does not occur in preview mode:
But in fast mode it does:
Same thing with a different png:
As you can see the roughness of the below appearance does not change the result.