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About VXGI, for now it has many bugs and lacking features like emissive materaisl aren’t part of their GI system for now, the same for indirect specular. Also VXGI is programmed to only have one bounce level which is not eneough for many scenes since some areas don’t get lit by just one bounce thus the lack of many needed results like indirect refelctions.
Does DFGI work interiors for the time being? How many bounces does it have (I hope at least two to be reasonable)? Will it be available to to 4.8 preview when it comes to launcher? Thanks !
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I can answer this for you:
VXGI emissive:
DFGI emissive:
Although DFGI may have a significantly greater performance now compared to VXGI, this is the level of quality you will get if you look closely.
I’m not sure how the quality of DFGI can be improved in the future whilst still having a competitive performance to VXGI - simply because VXGI uses Hardware Filtering which comes naturally from using a 3D Texture. Whereas, it seems that DFGI has to be filtered manually. Then again, DF shadows seem to be really good quality (not sure how its done yet) whereas the quality of voxel based shadows are heavily dependent on the voxel resolution.
DFGI is also only capable of diffuse reflections (not specular).
DFGI currently only has a single bounce as well.
I discovered from the 4.7 release that it now works for point lights and spotlights.