c3k Posted September 20, 2013 Share Posted September 20, 2013 Gents, As discussed here http://www.battlefront.com/community/showthread.php?p=1469300#post1469300 I've decided to post 4 pix. 2 pair, as identical as I could get them on two different machines. I used the same savegame and placed the camera as closely as possible to the same location. The nvidia pix are from a 1920x1200 screen. The AMD pix are from a 1920x1080 screen. Nvidia: AMD: Nvidia: AMD: The second pair used 3.6x mag. (Or something close to that.) Note that the time is frozen. It was interesting to see that the marksman is holding the rifle slightly differently based on the different video cards. No mods, beta build, I really don't remember the drivers offhand but they aren't more than 6 months old. Or so. Ken 0 Quote Link to comment Share on other sites More sharing options...
sfhand Posted September 20, 2013 Share Posted September 20, 2013 Wow... I wonder why the low bocage along the fence in the top two pics is so different. 0 Quote Link to comment Share on other sites More sharing options...
Seedorf81 Posted September 20, 2013 Share Posted September 20, 2013 Wow... I wonder why the low bocage along the fence in the top two pics is so different. Angle is slightly different, but don't know if that explains it. 0 Quote Link to comment Share on other sites More sharing options...
A Canadian Cat Posted September 20, 2013 Share Posted September 20, 2013 Wow... I wonder why the low bocage along the fence in the top two pics is so different. Look at the trees' main branches. Especially the one to the left and closest to the tank. The way I interpret that is the game saves where the trees are but not which exact model variant of tree A should be used. On load various versions of trees and bushes etc are randomly placed where the saved game says there is a tree A or an bush B or low bocage. Just a guess mind you... 0 Quote Link to comment Share on other sites More sharing options...
c3k Posted September 20, 2013 Author Share Posted September 20, 2013 Look at the trees' main branches. Especially the one to the left and closest to the tank. The way I interpret that is the game saves where the trees are but not which exact model variant of tree A should be used. On load various versions of trees and bushes etc are randomly placed where the saved game says there is a tree A or an bush B or low bocage. Just a guess mind you... LOL! If I -know- I have a tight LOF to an enemy unit, should I keep reloading the turn until I get the "right" tree? 0 Quote Link to comment Share on other sites More sharing options...
Wicky Posted September 20, 2013 Share Posted September 20, 2013 IIRC trees & veg are generated by an algorithm - if the trees & LOS/LOF fluctuate depending on if the game is saved then reloading could be fun... http://www.battlefront.com/community/showthread.php?t=111509 http://www.battlefront.com/community/showthread.php?t=111479 0 Quote Link to comment Share on other sites More sharing options...
General Lee Irked Posted September 20, 2013 Share Posted September 20, 2013 LOL! If I -know- I have a tight LOF to an enemy unit, should I keep reloading the turn until I get the "right" tree? There ya go again "Tree Hugging"... Gamey Basterd 0 Quote Link to comment Share on other sites More sharing options...
Vanir Ausf B Posted September 21, 2013 Share Posted September 21, 2013 Assuming the graphics settings are identical it appears the AMD has a longer draw distance, which surprises me since I thought that was controlled by the game. The open field in the background has varied grass length in the AMD shot while the Nvidia is uniform. Nvidia self-shadowing is noticeably softer in both sets of pics. This is most evident in the first pair of shots where the 2 barrels on the tank each cast a distinct shadow in the AMD shot but are blurred together in the Nvidia shot. 0 Quote Link to comment Share on other sites More sharing options...
Michael Emrys Posted September 21, 2013 Share Posted September 21, 2013 On the other hand, the Nvidia image of the tank is more contrasty while the foliage along the fence is less so. Curious. Michael 0 Quote Link to comment Share on other sites More sharing options...
Guest Posted September 21, 2013 Share Posted September 21, 2013 Assuming the graphics settings are identical it appears the AMD has a longer draw distance, which surprises me since I thought that was controlled by the game. Ahh. We don't control things, the drivers control things. We make kind, gentle requests of them, and they generally do whatever they feel like. We can say "make the draw distance this" and every single video card can have a slightly different interpretation of what that means (or in some cases, with some instructions, ignore the request entirely). Whee. The open field in the background has varied grass length in the AMD shot while the Nvidia is uniform. That's the engine. Just local variability. Nvidia self-shadowing is noticeably softer in both sets of pics. This is most evident in the first pair of shots where the 2 barrels on the tank each cast a distinct shadow in the AMD shot but are blurred together in the Nvidia shot. Nvidia cards tend to have much better support for the texel fetches we use for shadows. Not a hard and fast rule, but in general we can use a much larger kernel for shadow softening on Nvidia cards without causing a performance hit. Every new driver version, regardless of manufacturer, has different levels of OpenGL support, different optimization goals, and different bugs. Every card has (sometimes WILDLY) different architecture, all of which react differently to all kinds of things. Basically it's a giant unpredictability matrix... you'll get a slightly different experience (even if you don't necessarily notice it) on pretty much every different piece of hardware. Kinda fun. Can be hard to code for, though. 0 Quote Link to comment Share on other sites More sharing options...
togi Posted September 21, 2013 Share Posted September 21, 2013 HD6870 is a lower standard card with regards to the GFX 670 Nvdia the results seem normal. I have HD 7870 XT, the shadows looks better than HD6870 but I agree on that NVDIA support for OpenGL is better than ATI regards 0 Quote Link to comment Share on other sites More sharing options...
Buzz Posted September 21, 2013 Share Posted September 21, 2013 Phil.... "Basically it's a giant unpredictability matrix... you'll get a slightly different experience (even if you don't necessarily notice it) on pretty much every different piece of hardware. Kinda fun. Can be hard to code for, though.." I appreciate your enthusiasm Phil ..Whee Nvidia card looks better on my Mac Pro with an old ATI Radeon HD 4870 512 MB graphics at 2560 x 1440 - DELL U2713HM Display 0 Quote Link to comment Share on other sites More sharing options...
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