Mejjo

The TEXTURE_SIZE_EXP Tweak

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Afternoon all,

I've come across this tweak ( TEXTURE_SIZE_ESP ) For P3D V4. I'm wondering if anyone here can share some thoughts on it? Does it actually improve performance in the sim? I have had a look around about it but i thought i'd ask here directly for anyone's thoughts on it. I'm usually quite weary when applying any tweaks to a config file but if it improves performance then i'm all for it. 

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30 minutes ago, Mejjo said:

Afternoon all,

I've come across this tweak ( TEXTURE_SIZE_ESP ) For P3D V4. I'm wondering if anyone here can share some thoughts on it? Does it actually improve performance in the sim? I have had a look around about it but i thought i'd ask here directly for anyone's thoughts on it. I'm usually quite weary when applying any tweaks to a config file but if it improves performance then i'm all for it. 

It basically improves texture detail at far distances at the expense of vram. A setting of 10 will almost saturate my 1080ti.

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would like to know as well how it improves/affects the terrain appearance as the textures appear to have been 1024 resolution since fsx as can be seen in the scenery\world\textures folder and remain the same in v4. Checking the high resolution terrain checkbox which has been found by others to be same as EXP=9 does make the terrain textures sharper even at 3km distance and EXP=10 with little visual difference if any vastly increases loading time and causes stutters on my system. It has been explained it increases the terrain tile resolution from 256 to 512 and 1024, but what exactly is that as looking at texture files the terrain textures have been 1024 in the earlier sim versions as well. Did the previous sim versions not use/display the available texture resolutions fully?

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so if you leave the texture_size_exp tweak out, it defaults to a value of 9 as long as you have High Resolution Terrain checked in P3D's settings?

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Essentially, yes. And if you increase it to 10, you'd better have a monster video card.

Frankly, UNLESS you have a monster system with a monster video card - leave it alone. It will cause more trouble than it's worth.

Vic

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I had it at 10 before and it looks awesome... but i think I'll leave it at 9. I want some breathing room for my GPU for other stuff.

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No doubt on a quick check it will look awesome. The problems arise when you're flying for a while and your system starts to struggle.

Vic

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Vic, could you please change the topic title? I already foresee people asking why "TEXTURE_SIZE_ESP=10" does nothing (or crashes the sim?). Thanks

I use "TEXTURE_SIZE_EXP=10" at present (with a EVGA 1080Ti). It fills 8 of the 11 GB of graphics memory and incurs a (very) noticeable longer loading time, but otherwise didn't destroy the sim - yet. It's even not that hard on fps, at least less than higher autogen settings. It certainly looks better than the default of 8, but in case of trouble you can well do without it.

In any case, I only fly GA and keep an eye on it... I have it in mind, just in case something evil will surface.

To be honest, there are some videos around trying to explain what it does, but they are beyond my understanding.

Kind regards, Michael

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I also have it on 10 with my 1080ti. The loading times are longer but the visuals are breathtaking :-)

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Missed that. :laugh:

Don't get me wrong, =10 is great if your card can handle it and other factors being in place. High density airports, heavy cloud cover in a complex a/c could be another story. It's just that there are many people who just randomly tweak with no regard for how their system can handle it and then fill the forums with issues that could have been avoided.

FWIW, I consider the 1080ti and up "monster" cards

Vic

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TEXTURE_SIZE_EXP=9 is actually a very good setting for a video card that can handle it.  I've got a GTX1070 and this setting has really improved the loading of texture tiles, so that they do not suddenly appear close in..

Visually, it is a real improvement...  Try it, if you have not already  :cool:

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2 hours ago, Bert Pieke said:

TEXTURE_SIZE_EXP=9 is actually a very good setting for a video card that can handle it.  I've got a GTX1070 and this setting has really improved the loading of texture tiles, so that they do not suddenly appear close in..

Visually, it is a real improvement...  Try it, if you have not already  :cool:

Hi Bert,

I know this settings affects memory load, but would it have a reasonable impact on GPU load?  I have an EVGA 980TI OC and water cooled, unfortunately it is already running to its limits in terms of GPU load, the memory is still ok.

Best Regards,

Simbol

Edited by simbol
WebMaximus answered one of my questions with his post

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I use =9 since I found this tweak and never had any issues with it. However, recently I did a longer flight with the AS CRJ and suddenly my autogen also disappeared upon decent. I do not know if there is any connection, as I also installed a new mesh just prior this flight (I switched from FSGenesis to PILOT's FS Global 2018). Since then, I never did another longer flight, so I do not know if there is any relation to this. But, as the load on the system is considerably higher with TEXTURE_SIZE_EXP=9, it might be related to the late autogen loading issue...

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Anyone know where to actually tweak the setting? I couldn’t seem to find it in the P3D cfg anywhere, maybe in the scenery cfg?

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Add TEXTURE_SIZE_EXP=9 (or 10) under [TERRAIN] in prepar3d.cfg 

Jac

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As far as I know, setting TEXTURE_SIZE_EXP=9 is equivalent to checking the checkbox "Use high-resolution terrain textures" in the User Interface under "World", thus it's not actually necessary to tweak the config file.

TEXTURE_SIZE_EXP=10 is different though and can't be set via the UI, for a reason.

Kind regards, Michael

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Not sure that setting TEXTURE_SIZE_EXP=9 is equivalent to checking the checkbox "Use high-resolution terrain textures" in the User Interface under "World"...

The guidance from the LM team is less than clear on this..

As for it already being the default... as best I can tell, the default is =8.

Here is my Terrain section:

[TERRAIN]
TEXTURE_SIZE_EXP=9
LOD_RADIUS=4.500000
TESSELLATION_FACTOR=85
MESH_RESOLUTION=23
TEXTURE_RESOLUTION=25
AUTOGEN_VEGETATION_DENSITY=2
AUTOGEN_BUILDING_DENSITY=3
DETAIL_TEXTURE=1
HIGH_RESOLUTION_TERRAIN_TEXTURES=0

 

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8 hours ago, simbol said:

Hi Bert,

I know this settings affects memory load, but would it have a reasonable impact on GPU load?  I have an EVGA 980TI OC and water cooled, unfortunately it is already running to its limits in terms of GPU load, the memory is still ok.

Best Regards,

Simbol

It doubles the amount of memory used on my GPU.. as for GPU load, I have not noticed a change.

As best I can tell, it loads more detailed texture tiles out farther in the distance, with the result that they are not flipping right in front of the airplane..

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7 minutes ago, Bert Pieke said:

As best I can tell, it loads more detailed texture tiles out farther in the distance, with the result that they are not flipping right in front of the airplane..

I usually use TEXTURE_SIZE_EXP=10. You are right, textures (in mountainous regions) don't longer flip right in front of the plane but farther away, being a bit less annoying.

Would be high time LM tackles the issue from the root cause.

And yes, the default is 8.

Kind regards, Michael

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28 minutes ago, Bert Pieke said:

Not sure that setting TEXTURE_SIZE_EXP=9 is equivalent to checking the checkbox "Use high-resolution terrain textures" in the User Interface under "World"...

I thought I read this on the LM  forum but can't find the contribution anymore. Thus it may or my not apply, perhaps someone of the experts can verify/falsify my statement.

Kind regards, Michael

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I've used 9 and 10. They are both great, my system can handle 10 all day. I ended up reverting though because even on my Samsung 960 Nvme drive the load times were EXCRUCIATINGLY slow... It wasn't worth the trade off.

Yes it looked great but not that much better than default to wait almost 2-3 minutes or more to load. Yes Vram was 9.5 to 10gb but the card still had overhead. 

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24 minutes ago, pmb said:

 You are right, textures (in mountainous regions) don't longer flip right in front of the plane but farther away, being a bit less annoying.

 

Just to add to the confusion... mountainous regions are not really the issue, it is texture resolution on flat land, not mesh that I notice the improvement on..

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Hi All,

 

I'm bumping an old thread instead of starting a new one.

 

I'm one who uses the TEXTURE_SIZE_EXP = 10 tweak as the visual effects are fantastic. I am mindful however that using this tweak uses a massive amount of memory on the graphics card (maxes out the 8GB on my 1080) and I seem to recall Rob saying once that you really need at LEAST 8GB of video memory to utilise it.

 

With the new 2000 series cards around the corner, I note that only the 2080 TI has more than the 8GB with the 2080 coming with 8GB. Early reports I've seen indicate that the 2080 and the 1080 TI are very similar in performance with the 1080 TI likely to become significantly cheaper.

 

Given that the 1080 TI comes with 11GB of RAM, is this a better choice over the 2080 with 8GB. Mindful that there are other aspects of the 2080 that are superior.

 

Thoughts?

 

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