Author Topic: large project in lumion?  (Read 6577 times)

IP_jeanlo

    Reputation: 10
large project in lumion?
« on: June 27, 2012, 01:12:09 pm »
June 27, 2012, 01:12:09 pm
hello,

I wonder if we can make a projet 6x4km (24km²) in lumion?

The modeling project will be of sketchup.

Thank you for your lights.

Re: large project in lumion?
« Reply #1 on: June 27, 2012, 04:40:51 pm »
June 27, 2012, 04:40:51 pm
There's only one way to find out :)

I should mention that models that are far away from the center of the Lumion world will appear to wobble/shake slightly when you move the camera due to the fact that Lumion (and many other real-time 3D engines) suffer from floating point precision inaccuracies when placed far away from 0,0,0.

For that reason, it's best to place the main focal points of your project near 0,0,0.

stucki

    Reputation: 32
Re: large project in lumion?
« Reply #2 on: June 27, 2012, 08:21:46 pm »
June 27, 2012, 08:21:46 pm
sorry to highjack this ...
but i am very curious about this floting point precision thing. You mention that most other engines use this too.
is there an alternative for this ? Are there other possibilities to increase accuracy ?

kind regards
stucki

artmusicstudio.de

    Reputation: 0
Re: large project in lumion?
« Reply #3 on: June 27, 2012, 10:06:46 pm »
June 27, 2012, 10:06:46 pm
Hi, i have a 3 x 4 km Model in sketchup, Imported in lumion, working well, the only Thing is to know the Maximum size of the lumion Terrain for Modeling is about 2 x 2 km only.
In 2.2 you cannot Place objects Outside this area , but you can Place Them there and move to the Outsider area. In the New Version this Bug is repaired.
It is still important to Place the Su-Model somewhere around lumion 0.0.0 to be Able to Place it.
That is my experience so far.
Regeres Stan

IP_jeanlo

    Reputation: 10
Re: large project in lumion?
« Reply #4 on: June 28, 2012, 09:11:50 am »
June 28, 2012, 09:11:50 am
ok,

So if I understand it is necessary to the project center in lumion to 0.0.0.

Thank you for your information.

Re: large project in lumion?
« Reply #5 on: June 28, 2012, 11:42:47 am »
June 28, 2012, 11:42:47 am
sorry to highjack this ...
but i am very curious about this floting point precision thing. You mention that most other engines use this too.
is there an alternative for this ? Are there other possibilities to increase accuracy ?

Graphics cards are designed to operate with limited floating point accuracy, so if you want to add more accuracy, you basically have to convert all transformation values on the fly, and Ferry told me that this would make Lumion significantly slower.

Another option is to move everything in the scene, every time the camera has moved x meters, so that the camera is always reasonably close to 0,0,0. The disadvantage is that there would be a delay every time that happened. This is how they did it in the Flight Simulator franchise, but it might have some unexpected side effects in Lumion, for example with regards to the ocean which relies on projection.

Re: large project in lumion?
« Reply #6 on: June 28, 2012, 11:46:15 am »
June 28, 2012, 11:46:15 am
Hi, i have a 3 x 4 km Model in sketchup, Imported in lumion, working well, the only Thing is to know the Maximum size of the lumion Terrain for Modeling is about 2 x 2 km only.

(2048x2048m)

In 2.2 you cannot Place objects Outside this area , but you can Place Them there and move to the Outsider area. In the New Version this Bug is repaired.
It is still important to Place the Su-Model somewhere around lumion 0.0.0 to be Able to Place it.

Yup, that's correct.

Gaieus

    Reputation: 44
Re: large project in lumion?
« Reply #7 on: June 29, 2012, 08:19:59 am »
June 29, 2012, 08:19:59 am
sorry to highjack this ...
but i am very curious about this floting point precision thing. You mention that most other engines use this too.
is there an alternative for this ? Are there other possibilities to increase accuracy ?
If someone uses SketchUp and has ever imported georeferenced CAD files,he knows what it is like being kilometres from the SU origin. Geometry distorts, clipping strikes etc. It's impossible to work with the model.

It is still important to Place the Su-Model somewhere around lumion 0.0.0 to be Able to Place it.
That is my experience so far.
And with really big SU models,it is a good practice to move the model in SU already to have its centre near the SU origin. So in case of a 2km x 2 km square it only stretches 1 km from the origin in every direction (along each axis). This way, when you import it into Lumion, it will be placed (with its insertion point) into the middle of the Lumion working area.

RAD

    Reputation: 32
Re: large project in lumion?
« Reply #8 on: June 29, 2012, 08:39:57 am »
June 29, 2012, 08:39:57 am
it is vector vs. raster

autocad = vector
lumion = raster

import your  24km x 24 km model into Lumion. 
If it is giving you problems because it is too big = scale it down

kabouia

    Reputation: 0
Re: large project in lumion?
« Reply #9 on: September 09, 2012, 04:41:53 pm »
September 09, 2012, 04:41:53 pm
hello,

I wonder if we can make a projet 6x4km (24km²) in lumion?

The modeling project will be of sketchup.

Thank you for your lights.

Re: large project in lumion?
« Reply #10 on: September 10, 2012, 10:49:06 am »
September 10, 2012, 10:49:06 am
Hi kabouia, I don't know how detailed your scene needs to be, but as a general rule, large-scale projects with thousands of trees, cars etc will require a modern PC with plenty of system memory and Windows 64-bit as well as a fast graphics card with lots of on-board memory.

For that reason, I would recommend that you download Lumion Free and make a test on your PC to see if it will work.