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Separate your shadows and GI/AO layers within the compositor to adjust their colours: By default in Blender, shadows and GI are black. This doesn’t always give the best result. If you look at Pixar’s work, for example, the shadow is usually a darker, more saturated version of the diffuse colour. You can achieve this effect in the compositor by specifying your layer to output a separate GI and shadow pass. Use the Mix node set to multiply your shadow/GI with a colour of choice, them Mix that back into your render pass for best effect. We sometimes render a scene (Scene01) with no GI or shadows at all, and an identical copy of that same scene (Scene02) to get just the GI and shadows layers by themselves. Use the compositor back in Scene01 to composite those layers from Scene02, using the colour picker inside the Mix node set to Multiply or Add to achieve the shadow colour we need.
I am a big fan of the node based compositor in Blender, but I always get annoyed by how slow it is. This makes comparing two different outputs in the node tree practically impossible. Fortunately there is a solution: The split viewer. This node replaces the default viewer and has two input sockets that are displayed next to each other. To see them you need to enable the backdrop in the top right corner of the compositor. I use it all the time when post processing my renders.
Last, but certainly not least: the simplest possible solution is usually the best one to choose for every part of your hard surface model, especially in the beginning. Small operations, clean meshes, and a principled approach are the best investments that you can make in your model. It’s worth remembering that you can always add another subdivision as you progress—once you’ve made the commitment, however, more geometry means that more of your labor and time will be required to modify what you’ve subdivided later on. This is probably the most compelling reason to follow this last tip—a low-poly foundation makes working in broad strokes much easier. Once you’re happy with what’s in front of you, you’ll be able to really dive in without wasting time.
You can make Blender part of your professional pipeline with this set of workflow tips and tricks from five of its leading artists. Blender may be free, but it isn’t just a tool for hobbyists. The powerful open-source 3D package is now used on a variety of professional projects, from the Blender Foundation’s own ‘open movies’ to illustrations, animated commercials and even visual effects work. While the fundamentals of Blender are well covered by training materials available online, there is little information targeted specifically towards this new group of professional users. Find additional info at https://3darts.org/.
