Problems with mp

[vilas 477]

sometimes people report to different addons problems in MP, why it doesn't appear in SP

why something works in SP during tests, missions but people had problems with addons in MP

what are those problems ?

someone reported now RHS Hind problem with cannon, i had reported (before quick fix 2) problem/CTD with one of my WW2 units ?

i always thought that MP and SP is the same game ?

[sanctuary 19]

I can't say for sure for Arma, but in OFP there were 3 major source of soldiers making a MP game to CTD while SP was totally fine :

-one or more of the textures of those soldiers were not correct sized.

Size of the sides of the textures must be a power of 2 , like 32 - 64 -128 -256 -512 - 1024 etc... , as an example a texture that would have a size of 512x1011 would CTD in MP, the same for a 251x526, those kind of size are not power of 2 and would CTD in MP everytime.

-one or more of the textures had a side that was 8 times or more than the other side.

Kegetys explained this was a remnant of the Glide support code if i remember well, if a texture was by example : 32x1024 , despite both side are power of 2 , one of the side is 8 time or more than the other , and so it would lead to a CTD directly in MP

In OFP there was a popular A10 addon of high quality (i don't remember the author) that featured unfortunately such size ratio that lead to MP CTD.

-scripting built-in the soldier

locality is extremely important, scripts not optimised in regard to locality could be run multiple times (multiplied by the amount of human player), and could lead the server ressources and bandwitdh to just die, leading to CTD.

While in SP everything is fine, as you only have 1 human player running such script.

Additionally, some scripting commands produce different results in SP than in MP making adaptation very difficult, and some other commands just do not work at all in MP while in SP it would.