New issue 647: Volume Rendering + Log Fields + Zeros https://bitbucket.org/yt_analysis/yt/issue/647/volume-rendering-log-fields-z... Sam Skillman: Currently if you have a volume rendering of a field that is done in log-space and there are zeros/negative values in the raw field data, the resulting NaNs contaminate the image, causing most if not all of the rendering to be empty (zeros). Responsible: samskillman