VXGI area light for character shadow problems。

anonymous_user_c4d29e88 · January 4, 2017, 3:50pm

Can vxgi emissive material create shadows like point lights?The noise shadow and other move detail shadows.but now i make emissive material just can create actor whole soft shadow:rolleyes:

darthviper107 · January 4, 2017, 4:43pm

You’re not going to be able to create emissive lighting that’s similar to the results of an actual light object, it doesn’t have enough accuracy to try and simulate that.

anonymous_user_c4d29e88 · January 5, 2017, 1:47am

Thank you for you answerer！ Do you mean emissive can’t create shadow like point light?but i saw some from here Soft Self Shadows with VXGI?? - Rendering - Epic Developer Community Forums if It can work so what can i do？

darthviper107 · January 5, 2017, 2:23am

You can’t, the voxel sizes are too big to get that much detail.

anonymous_user_c4d29e88 · January 5, 2017, 3:15am

r.VXGI.MapSize 256 Is this the limit?

Chesire · January 5, 2017, 7:26am

That’s indeed the limit but you should never use is. 256 will give a HUGE performance hit over 128 with very little quality improvement.
Also as Darth already commented, it’s impossible for emissive materials to give accurate soft shadows.
You will need to use a Spotlight.

Adeptus · January 6, 2017, 11:07am

Question on the side, whats this demo from? I wanna check it out too.