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GPU particles or Vector fields limitations?

I put 12 vector fields and 1 gpu particle emitter on my level. It was assumed that all vector fields will effect on particles flow, but only 4 of 12 fields work. I googled a lot, but couldn't find any useful information. Does UE4 have any unobvious limits in GPU particles or vector fields?

Similar question without solution: https://answers.unrealengine.com/questions/375747/only-four-vector-fields-working-in-blueprint.html

Product Version: UE 4.15
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asked Jul 11 '17 at 06:07 AM in Using UE4

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You are right, and only 4 most relevant vector fields will affect your particles. This is a limitation of how it is hardcoded, probably considering performance/usability factors.

If you are fine with recompiling the engine yourself, you can edit MAX_VECTOR_FIELDS in both particle simulation shader and C++ code, and uncomment several lines to expand support for more fields at once, but generally, it is not very practical.

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answered Jul 11 '17 at 07:11 AM

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avatar image slonorib Jul 11 '17 at 08:16 AM

Thank you :)

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