Explosion smoke tweak #1910

Job	Run time
code-tests (CODE)	4m 31s
map-tests (operation_trebuchet)	1m 55s
code-tests (WEB)	2m 50s
map-tests (slayer)	1m 52s
map-tests (firefight)	1m 51s
map-tests (crusade)	2m 17s
map-tests (stranded)	1m 53s
map-tests (first_contact)	2m 16s
map-tests (ks7_elmsville)	3m 20s
map-tests (ks7_elmsville_spaceodp)	3m 21s
map-tests (base_assault)	2m 13s
map-tests (base_assault_unsc_defend_vs_urf)	2m 18s
map-tests (unsc_achlys)	1m 52s
map-tests (base_assault_neutral_base)	2m 13s
map-tests (base_assault_neutral_base_taurus)	2m 21s
map-tests (geminus_city)	3m 24s
map-tests (geminus_city_urf_active)	3m 12s
map-tests (system_conquest)	8m 17s
	51m 56s

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