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FS2004 big ground poly scenery

Andrea80

Andrea80

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163
Country
italy
As you probably see in the showroom section, I've started do design the ground layer in my Milan VFR scenery.
Because I want to maintain a resolution higher than the default fs9 4.8m/px I've decided for the ground poly solution.
I have a large bmp, covering an huge area 17km x 15km, bitmap is not geo referenced, but this was not a problem, I have made the geo data by myself.
In Gmax I've designed a mesh large exactly as the area covered by bitmap.
The mesh plan is subdivided in 15 sectors and I divided the bitmap in 15 sectors each one cover one of the mesh sector.
I've exported the mesh with fs2002 gamepack, then tweaked the asm files and the scenery in Fs2004 is perfect and correctly placed, just for reference I've also the Ultimate Terrain Europe installed, and during night UTEurope lights perfectly merge with my photo scenery scenery.

But... I see a strange behavior in my Fs2004, If I load my aircraft in an airport located inside my scenery it load pretty fast, but when loaded if I right click to open menus or If I push "Alt" to open Fs menu, the simulator took about 10 seconds to display menu, same if I close the menu, I have at least 5 to 10 seconds prior the simulator is back to normality...
Normally without my photoscenery activated those operation take max 1 second, so maybe my scenery have problem of some kind...

The question is? may large Bgl cause general slowness? is there a maximum size for a ground poly?

I put some other details:
Ground poly count only 180 polygon.
Texture are 15 1024x1024 dxt3 files, so they have a little impact.

Ground poly is a single file, with only 1 reference point, I have tried to divide it in 15 blocks and compiled as 15 different bgl, but with only 1 reference point, so the corner sectors have its reference point outside its limits because is in the middle of the whole scenery, but the problem of menu slowness remain.......

Acquisizione%20a%20schermo%20intero%2003042010%20130025.bmp.jpg


this is a gmax shot, I've colored sectors so you can see the subdivision, the Geo reference point is the center of the image, every sector is 3,4km X 5 km, corner sector reference point is 8km far from the sector, I don't know if this may lead to problems.

Sorry if the question is too long, hope someone can help me :)

Thanks, Andrea.
 
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Hi,

I would not put objects that far from the reference point, I have had trouble with that in the past. My polygons just did not show.

But that should not give your menu trouble. You mention you only have 15 texture, would you not have a lot more for a high resolution ground scenery of 15 x 15 km? Having so many textures could give a big burden.
 
Hi Arno, thanks for reply.
At the moment I create only 15 sectors for testing purposes, I was trying to figure out if I was able to create a ground poly, FPS testing, ability to tweak asm and all the stuff concerning ground poly creation.

My idea to improve the scenery, is to create a more detailed poly, with an adaptive mesh grid, to reproduce little hills but with less detail in flat zones.

second improvement is to divide the bitmap in smaller tiles, like 512x512 or less, obviously with more texture as result.

But, this problem of menu slowness is strange, despite the fact that the scenery has few polys and only 15Mb of totale texture, in fact the sim has no problem when loading the scenery, I've controlled also the system memory used by Fs9 when my scenery is loaded, and still at very low level about 500Mb.... btw FPS still stable at 35 (my imposed max value) so is hard to figure out where is the problem, load time is low, performance are high, but something slow down menus.... very strange, I hope the 2 improvements will mitigate the problem... really I hope, but I'm not sure...

Also the problem of having bgls with far reference point :( this is due the fact I split the big 17km x 15km in 15 blocks, to display them correctly in fs9 I left them in the Gmax position, I will try to place them with a reference point located in the center of every block, but will be very hard to calculate the displacement from meters to degrees, I hope fs9 have enough precision in degrees reference system..... :) but I will try :(
 
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Why can't you just use a small portion of the scenery as a polygon (the part you want the best quality) and have the rest as a ground texture?
 
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