Document known performance issues with Sprite3D
Document known performance issues with Sprite3D

See https://github.com/godotengine/godot/issues/20855.

vnen/godot,pkowal1982/godot,Shockblast/godot,vkbsb/godot,josempans/godot,firefly2442/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,Zylann/godot,Valentactive/godot,honix/godot,vkbsb/godot,josempans/godot,Shockblast/godot,vkbsb/godot,guilhermefelipecgs/godot,vnen/godot,sanikoyes/godot,MarianoGnu/godot,josempans/godot,Valentactive/godot,josempans/godot,Shockblast/godot,BastiaanOlij/godot,firefly2442/godot,godotengine/godot,Faless/godot,Valentactive/godot,godotengine/godot,firefly2442/godot,Shockblast/godot,honix/godot,pkowal1982/godot,vnen/godot,Paulloz/godot,honix/godot,vnen/godot,sanikoyes/godot,guilhermefelipecgs/godot,MarianoGnu/godot,honix/godot,guilhermefelipecgs/godot,Faless/godot,akien-mga/godot,ZuBsPaCe/godot,godotengine/godot,pkowal1982/godot,vkbsb/godot,DmitriySalnikov/godot,Zylann/godot,josempans/godot,MarianoGnu/godot,Zylann/godot,godotengine/godot,BastiaanOlij/godot,sanikoyes/godot,DmitriySalnikov/godot,firefly2442/godot,josempans/godot,vnen/godot,Paulloz/godot,sanikoyes/godot,honix/godot,firefly2442/godot,Zylann/godot,vnen/godot,godotengine/godot,akien-mga/godot,sanikoyes/godot,akien-mga/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,vkbsb/godot,BastiaanOlij/godot,ZuBsPaCe/godot,BastiaanOlij/godot,DmitriySalnikov/godot,pkowal1982/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,akien-mga/godot,Faless/godot,BastiaanOlij/godot,josempans/godot,Zylann/godot,godotengine/godot,firefly2442/godot,firefly2442/godot,pkowal1982/godot,Faless/godot,firefly2442/godot,sanikoyes/godot,MarianoGnu/godot,vkbsb/godot,Paulloz/godot,BastiaanOlij/godot,akien-mga/godot,Valentactive/godot,pkowal1982/godot,akien-mga/godot,MarianoGnu/godot,Shockblast/godot,Shockblast/godot,pkowal1982/godot,guilhermefelipecgs/godot,vkbsb/godot,ZuBsPaCe/godot,Shockblast/godot,Zylann/godot,vnen/godot,MarianoGnu/godot,Paulloz/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,godotengine/godot,guilhermefelipecgs/godot,Shockblast/godot,godotengine/godot,Zylann/godot,MarianoGnu/godot,Faless/godot,Zylann/godot,DmitriySalnikov/godot,vnen/godot,BastiaanOlij/godot,Paulloz/godot,Paulloz/godot,akien-mga/godot,Paulloz/godot,Valentactive/godot,Valentactive/godot,akien-mga/godot,Valentactive/godot,vkbsb/godot,MarianoGnu/godot,Faless/godot,Faless/godot,josempans/godot,Faless/godot,DmitriySalnikov/godot,BastiaanOlij/godot,Valentactive/godot,ZuBsPaCe/godot,pkowal1982/godot,sanikoyes/godot,sanikoyes/godot,honix/godot