What’s new in Turtle 4.1?

• Global Illumination Interface
  Thanks to a new unified GI user interface, setting up GI renders is a breeze in Turtle 4.1. This enables you to select the primary and secondary GI solver of your choice, and then tune them individually. You can even use specific GI solvers for different ray types. Many GI settings have also been changed in order to simplify setup. The settings are now more intuitive and many have an automatic mode, wherein Turtle calculates suitable values for you. This means less tweaking and headache when using global illumination.
Path Tracing
In Turtle 4.1, Path Tracing is included in the global illumination toolbox. This means that it’s now much easier to setup multi bounce global illumination renders, without tuning complicated photon mapping settings or having to commit to the long render time needed for multiple depth final gather. And, as icing on the cake, the path tracer supports lighting from incandescent objects and HDR environments. Oh, and did we mention it’s unbiased?
• Environment Interface
  Turtle 4.1 also got all “Extreme Makeover” on the Image Based Lighting and HDR user interface and unified the settings for controlling the environment. This makes it super-easy to setup environments and backgrounds for both the final renders and the GI solution.
  
• Radiance Cache
  Turtle 4.1 introduces the Radiance Cache, significantly speeding up Radiosity Normal Map calculations. Even more importantly, quality is improved dramatically, resulting in much smoother results compared to RNM’s in Turtle 4.0.
• Surface Transfer Presets
  Surface Transfer sampling now has three presets (Inwards, Outwards and Closest) with which to speed up the initial tuning of a transfer.

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