Hi andy_vs
Not fat calculation, fat uses tissue, not cloth, they do not need to collide, in order to speed up the calculation, I built these muscles according to the direction of the muscle shape of the original model, thus saving a lot of muscles, using Zattachment's sliding mode combined with bones can replace some muscles and play a supporting role, but there is a void in the middle. Although these muscle calculations are correct, the final calculation of the collision with cloth is false, increasing the substeps value. The final effect will only be a little better, and the calculation time will be increased a lot. After my test, there is no error in the collision between the solid mesh and the cloth, and the speed is also very fast. All bones and muscles are fully enclosed mesh,
How can you solve this problem? Thx.