If you’re using the skin shader, you may notice differences in the shadows when comparing Marmoset Viewer to Toolbag. For example, the shadows may appear to be much more or less blurry in Toolbag, or the shadows may not show up very well in Marmoset Viewer. The reason for this is that the Shadow Blur skin shader setting in Toolbag is dependent on scene/mesh scale and camera FOV. We have updated the skin shader in Marmoset Viewer to be more consistent in this regard, however we are still researching how to make similar changes to Toolbag 3. In the mean time, you may need to export a few test scenes until you’re happy with the Shadow Blur setting.
