So i installed 4 gb patch because i had problem that in the bus i had things white and atfer i installed it i always have black things but if i zoom it then the black thing dissaper and when i unzoom then it appears again i already did in steam forum discussion about it but they couldnt help me with that

Try to set max. texture memory to 0.0 MB.

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did but still didnt help

This is normal, that if you zoom on some texture it will "reveal itself", and if you unzoom, it will become black.
You cannot do anything with this.

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