Lets make Lightmass EPIC (and understandable)

[Enter Reality]

@heartlessphil: is this Production lighting or less? If you're able to achieve this lighting in 1 hours at Production level you won the competition

[heartlessphil]

This is production lighting yes.

But it's a big outdoor (mostly) scene, no furniture and small objects that would need huge amount of detailed shadows!!!

[Enter Reality]

This is production lighting yes.

But it's a big outdoor (mostly) scene, no furniture and small objects that would need huge amount of detailed shadows!!!

Ok, now I'm curious to see the test using an interior scene...like the one uploaded by Raghu

Could you also post your system specs? just for comparison

[heartlessphil]

My 2 pc were used to build the scene. Main is core i7 4970k+16gbram+gtx980, second pc is core i7 2600k+8gb ram+gtx 760ti

I will take an old interior/exterior scene I've made that took 10 hours to build and try to see how I can reduce the time while achieve similar quality. stay tuned.

[DanielW]

I have now checked in my Lightmass solver quality improvements:
A) Adds light portals - these solve static skylight quality in highly enclosed areas like the example
B) Fixed high IndirectLightingQuality settings disabling adaptive sampling - this improves static skylight quality
C) Fixed light leaks when using spotlights with StaticLightingLevelScale .1 - StaticLightingLevelScale is no longer applied to photon emission

These changes will be in 4.11 which will probably be in about 4 months.

So to wrap up Raghu's original post

1. How to remove the splotches in the area where there is no skylight hitting directly (Areas far from windows). As you can see in the above images there are so many splotches in gallery, despite having Indirect Lighting quality to = 10 and static Lighting Level scale = .1
2. Shadows become somewhat messy after a certain distance. How to make area shadows more clear and smooth.

This is addressed by A) + B)

3. Whenever we put spotlights to remove dark areas, it almost always gives the annoying problem of light leaks. Clearly evident in the above images.

This is addressed by C)

Sadly that's all the time I can spend on Lightmass atm, otherwise I would like to investigate some more complex scenes.

[heartlessphil]

Good work Daniel! Can't wait to test these features :-)

[DanielW]

Some comparisons

Raghu's original. Settings were StaticLightingLevelScale .1, IndirectLightingQuality 10, IndirectLightingSmoothness .75, no compression.


Improved solver quality + portals setup. Settings are StaticLightingLevelScale .2, IndirectLightingQuality 10, no compression, all others defaults. I probably should have turned down the smoothing a bit, notice how where the walls meet doesn't look quite right. Also, the exposure is different than Raghu's.


Raghu's original. Settings were StaticLightingLevelScale .1, IndirectLightingQuality 10, IndirectLightingSmoothness .75, no compression.


Improved solver quality + portals setup. Settings are StaticLightingLevelScale .2, IndirectLightingQuality 10, no compression, all others defaults.

[serriffe]

can't wait for 4.11

[tupikp]

Well... I might skip the 4.10 entirely... uh, can I? Or do I have to install 4.10 first before I can install 4.11?

[RI3DVIZ]

That looks good.

[heartlessphil]

Well... I might skip the 4.10 entirely... uh, can I? Or do I have to install 4.10 first before I can install 4.11?

Of course, you can upgrade directly to 4.11 when it's out! No need to actually update to every new versions.

[Mr.Snrub]

Thanks Daniel.

Is there a workaround for point C) at the moment?

[tupikp]

Thanks Daniel.

Is there a workaround for point C) at the moment?

You may try their useful trick in here https://forums.unrealengine.com/show...l=1#post379386

[Raghu]

@DanielW - Much Obliged

That's great news @DanielW. I cannot thank you much enough, desperately waiting for the 4.11. I could not have asked for more, was only thinking of the solution through BaseLightmass.ini but you have permanently incorporated the changes in Engine. That make things so much easier for new comers in UE4 for Arch-Vis.

[tupikp]

Of course, you can upgrade directly to 4.11 when it's out! No need to actually update to every new versions.

Sweet! 4 months eh? Can we just have it like tomorrow? *kidding