How avoid "artifacts" in a waving flag - Eevee 2.90

Artwork Works in Progress
1

Hello people; noob here looking for a help.
…
I’m frustrated searching how to reduce some annoying ‘artifacts’ (sorry but I’m not know the exact word to it) that appear in a waving flag. I’m using Blender 2.90 and Eevee.
.
I’m doing a flag from ‘import Plane as Image’, cloth, wind, etc, but it is not as cool as I would like to. Please see the pictures below. What I already tyried: less subdivisions (15); more subdivisions (50), solidify (or not) the flag; use another image; use the Modifier subdivisions (or not); rendering in several ‘Sampling’ resolutions (32, 64, 300); increase or decrease quality of collisions; increase & decrease quality of cloth, etc.
.
I’m using eevee instead Cycles because speed of rendering. It is a 2-minute ‘film’ with 3600 frames (1280 x 720), at 30 fps.

It seems that these ‘artifacts’ appear mainly when the flag waving to back, not towards the camera.

Please see the pictures below… the problem I mention are inside the red circles.

Any help is more than welcomed. Thank you all
Giovani - Brazil

image
image1920×1080 301 KB

2

Have you tried to check “self collision”?

3

hello Mikes

Yes, self-collisions are ‘on’ (the flag is colliding itself). Self collisions make not difference in regard to these artifacts. I think it is a bug… :frowning:

Thanks

4

Okay… i see, is it the bottom edge of the flag which is folded into the flag? …it is difficult to say. Maybe your subdivision modifier is placed before the cloth modifier? If so you, you could try and move the subdivision modifier before the cloth modifier and rebake the cloth cache ?

edit: actually it could also be a clipping issue of your camera. Artifacts like these happen sometimes if your start value is too low.