[Alexandre13]

You should say "YES" to that prompt.
Rhino is scaling it so as to keep it the same size under the new unit system.

Exactly Thomas,
1mm stays 1mm all the way: But I wanted the object to take scale to the new unit, 1mm becomes 1cm, 1cm becomes 1 m, 1m becomes 1km is it clear now: and vice versa
The light setting (camera aperture) was done when the scene was in km units.
Going down, just shows that when the objects get smaller and smaller and if you don't change the camera aperture the scene gets darker.
Obviously the distance of the camera is proportionally constant to the objects.
I am sure that if you start your settings with microns and keep them all the way to kilometers the final scene will be completely overexposed
I was trying to prove nothing, it is just a small experiment I wanted to share

I think the cameras are confusing and counterintuitive and Maxwell is good

I have been using 24x36 reflex cameras for the last 36 years and I'm used to it. But why not design a flexible input and please every body
And what about slow shutter speeds, like 15 seconds do you have an

[Thomas An.]

like 15 seconds Question do you have an idea ? ...

Well, as I mentioned, Maxwell shutterspeed is in "clicks per second" therefore 15 seconds is: 1click/15sec=0.066clicks/sec.

[Alexandre13]

Well, as I mentioned, Maxwell shutterspeed is in "clicks per second" therefore 15 seconds is: 1click/15sec=0.066clicks/sec.

Thanks for the math I figured that out

But I don't think that 0.066 is more usable than 15 sec and, at least the user should not have to do the math

This is an Alpha, we are here to think also about people who just want to use the renderer in a most comfortable way and give suggestions for
the GUI

[Thomas An.]

Hello,

I did a test with skylight and changed units. Here are the results:
Location Madrid, August 1st 10:00 AM. SS=0.25; fs=128
Camera 50mm
Render Time 10 minutes. Same diffuse material
It would be really nice if we could input the shutterspeed like on a real camera : 1/8s, 1/4s, 1/2s, 1s, 2s etc. The input of longer ss is now confusing in my opinion

units are meters


the micron rendering turned black.

Alexandre,

Is your test set up on a different principle than the one done earlier here (from meters-->centimeters)?
http://www.maxwellrender.com/forum/view ... ght=#22743

[Thomas An.]

One thing to consider is that if you shrink the model by changing the units without re-scaling, your camera film becomes larger and larger in proportion.

When the scene is 1km your film width,height are 36mm,24mm .... then you shrink the scene to 1micron and your film is still 36mm,24mm.
So basically in the 1micron situation your film (camera physical device) is 1 billion times bigger than before.

To illustrate this, look in the following example where the film width,height has been increased 10 fold. (all other settings identical, both lenses at 50mm)


This is probably why the 3dsMax plugin has a units multiplier; so that we do not have to scale the camera up and down all the time.

[Alexandre13]

Yesterday morning (05-10-2005) I did the same test increasing the the film by a factor of 10. And I got the same result as yours



If you look at the results, it seems that the film is proportonaly increasing oe decreasing. What is changing is the amount of light coming through the lens.
If I set my camera shutter and Fstop for a skylight environement for a mm scene and objects and keep these settings while I step to smaller or bigger scenes and objects the illumination doesn't stay constant. and this perfectly normal.

[Alexandre13]

Thomas,

If you want to take a picture of something small then you need to shrink the camera too along with your model.

No, you don't need to.

If I go from one unit to another and answer NO to scale my object is just changing to the new unit and scaled accordingly. 1mm becomes 1m if I had 1inch and I answer NO to scale and change to meters units then my object will have 1m.
I never had to readjust the scene. Try it your self

[Thomas An.]

Hold on.

Can you take a picture of a molecule with your 35mm SLR ?

I never had to readjust the scene. Try it your self

I already have tried it. What I am saying is different.
(How do you explain that I got the correct illumination with this 100x reduction test ? http://www.maxwellrender.com/forum/view ... ght=#22743

I am not making it up

[Alexandre13]

Thomas,
I think it's a bug. Look at my new post