Standard light with physical sky issue

[mrmoose]

Is it possible to use standard light with physical sky? I have done hundreds of try out with no success.

Thanks for any reply

[Pibuz]

Hey! Do you mean, is it possible to use emitters while having a sunlight system enabled? If so: yes, it is possible! But you will have to set your emitters' characteristics VERY VERY high, like extreme power, or extreme efficacy. I've tested this issue myself when playing with home made emitters; now that i think about that, would be interesting the behaviour of IES lights..
Hope I helped!

[Zom-B]

Hey mrmoose...

You'll have to edit your light strength settings (gain for blackbody for eaxample) under the 0.001 limit of C4D manually in the igs...

[CTZn]

Hey mrmoose...

You'll have to edit your light strength settings (gain for blackbody for eaxample) under the 0.001 limit of C4D manually in the igs...

Aren't you saying the contrary than pibuz, ZomB ? I don't know C4D but generally speaking gain should be amplified to a huge amount, not reduced...

I'm surprised you are asking, mrmoose, since you are around here for a while now

[Zom-B]

Afaik using BlackBody light together with SunSky the meshlight are so much brighter that tonemapping turns the sky black... isn't it??!

So lowering the gain of the bright Black Body should help!

[Kram1032]

...or the other way round: the emitter itself turns black due to not enough power/gain

[CTZn]

Afaik using BlackBody light together with SunSky the meshlight are so much brighter that tonemapping turns the sky black... isn't it??!

Indeed, you can see this happening if you set the meshlights gain to crazy values from the beginning, otherwise that's the contrary, black meshlights I guess that's what mrmoose is experiencing, am I right mrmoose ? Were you finally successfull ?

Now, maybe the C4D exporter uses inverse of gain in the UI (lower values = stronger lights). But that would not make much sense, I don't believe that's the case honestly.

[pixie]

regarding env maps one has to lower the lamps or the other way around in env map...

[Pinko5]

however is a very nightmare use the sunlight with artificial light...
and i dont know why this problem is already present in Indigo...
Luca.

[mrmoose]

Hey mrmoose...
I'm surprised you are asking, mrmoose, since you are around here for a while now

Ok, thanks for your reply.
I use Cindigo to export from Cinema to Indigo. My mistake was unit measure (i forgot it ). In Cinema i use cm but Indigo works in m and i don't fix the Global Scale Multiplier parameter. So the scene was too big for the emitters.

Now i fix it, setting the GSM parameter to 0.01 (so 1 in Cinema = 0.01 in Indigo) but emitters are still black. I have to increase Gain or Efficacy Scale parameters to see them

Only IES lights are not visible... I think that gain parameter don't work with IES, right?

mrmoose

[CTZn]

Only IES lights are not visible... I think that gain parameter don't work with IES, right?

mrmoose

Now YOU got me, I have tested IES once and I can't remember what parammeter is tweakable or not, between gain and temperature Certainly there is an issue if one can't tweak their relative power.

I don't know if the harder part comes from Indigo itself or the tonemapping method used when it comes to setting meshlights + sun... I would recommend not to use reinhard for this, here comes a method I remember now:

1° turn the lights off, use sun only.

2° Set the tonemapping (tm) to camera or linear (the film sensibility will be constant then, you want that in order to have some place marker in light intensity "space"). I stick with linear since it's easy to set (1 param). Set tm so sun light looks ok.

3° Mute the sun, don't touch the tm, and now find the right gain/efficacy value for meshlights. When you are done they will have an energy value close to sun.

4° Turn the sunsky on, divide tm value /2 or nearby and done !

Setting this all correctly is not hell, it's a few-steps process

Now for envmap I can't help, maybe the same process applies. I hope that helped !

[mrmoose]

Now YOU got me, I have tested IES once and I can't remember what parammeter is tweakable or not, between gain and temperature Certainly there is an issue if one can't tweak their relative power.

I don't know if the harder part comes from Indigo itself or the tonemapping method used when it comes to setting meshlights + sun... I would recommend not to use reinhard for this, here comes a method I remember now:

1° turn the lights off, use sun only.

2° Set the tonemapping (tm) to camera or linear (the film sensibility will be constant then, you want that in order to have some place marker in light intensity "space"). I stick with linear since it's easy to set (1 param). Set tm so sun light looks ok.

3° Mute the sun, don't touch the tm, and now find the right gain/efficacy value for meshlights. When you are done they will have an energy value close to sun.

4° Turn the sunsky on, divide tm value /2 or nearby and done !

Setting this all correctly is not hell, it's a few-steps process

Now for envmap I can't help, maybe the same process applies. I hope that helped !

Thanks CTZn, i'll try your method for sure!!!

mrmoose

[Woodie]

I tried that. So far my lamps are 2400W. IT is rendering so I will see results when back at home. 1200 was not enough.

[Kram1032]

IES don't work directly.. you need to manually edit them. (Using any simple text-editor should work fine, just change all the digits and or multiply the all the values by the same constant and save it as "_numberofIES_*_your_constant_.ies" or what ever you decide^^

[CTZn]

Any success following that ?