[znouza]

see the image:



bug list (http://www.maxwellrender.com/forum/viewtopic.php?t=1900) has been updated

[Thomas An.]

Can you explain this bug a little more ?
So far I have no problems with physical sky.

if your shutterspeeds is too low or your f/stop too low the sky will look bleached like this because of too much light getting into the camera. Also you need a large ground plane to simulate the horizon otherwise the bottom half will look all gray.

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[znouza]

Can you explain this bug a little more ?
So far I have no problems with physical sky.

if your shutterspeeds is too low or your f/stop too low the sky will look bleached like this because of too much light getting into the camera. Also you need a large ground plane to simulate the horizon otherwise the bottom half will look all gray.

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realize a simple block at [0,0,0]. If you only rotate camera around [0,0,0] (having the block always the same elevation and in center), the sky should be the same no matter on angle of view, because the sky is spherical. The intensity of physical sky is the same on the any angle of view to [0,0,0]. Or not?

[Thomas An.]

No, it should not be the same

Depending on the hour of the day, there is a brighter area in the sky around where the sun is supposed to be

[znouza]

No, it should not be the same

Depending on the hour of the day, there is a brighter area in the sky around where the sun is supposed to be

this is the test of physical sky _without_ sun light. so where did you specify the hour you want your physical sky be simulated to?

[Thomas An.]

I think the physical sky is correct.

How would Maxwell klnow what kind of sky to show you ?

The Maxwell sky (just as in reality) looks different at different times of the day. It is more yellow-orange early in the morning and then it becomes more blue later on. What kind of color would it have ?

When you uncheck the sun it means you just do not want it to cast shadows, but Maxwell still shows the actual sun from the sky based on some default time setting.

If you do not want to see the sun in the sky you can turn it away from view. (I think the SM setting might do that otherways you can rotate your scene in the other direction).

[znouza]

reopenned:

I mean the physical sky radio button only enables the behaviour of the physical sky dome - being as the 'real' sky, with turbidity, ozone etc...

the color of the sky is affected by the sun (and location/time/date) - if you don't turn the checkbox 'use sun light', the sky should not be colored or saturated by the sky light.

If am I right.. then the 'skydome' is wrong (because it has the same intensity - no matter on view angle). If not, the checkbox for using the sun light is useless.

maybe someone from NL team will tell the truth to us