Error of shape optimization

Most appropriate sub-area of Processing 4?

Core/Environment/Rendering, OpenGL, Export

Processing version

5/4.3.1/3.5.4

Operating system

Windows/Android

Steps to reproduce this

"1.Use alpha in color of fill(). It start can be visible.

2.3D primitives or obj models."

snippet

// Paste your code below :)

void setup() {
fullScreen(P3D);
}

void draw() {
background(0);
rotateY(PI/180*frameCount);
fill(255,50);
box(100);
//or obj model
}

Additional context

Fix it in p3 and p4 please. I making programs for old windows and android versions. And in p4 doesn't load and save files in play mode and released app.

Start by reproducing the supplied P3D sketch with translucent fill() and a 3D box or OBJ model on the Processing versions and platforms listed. Separate the alpha-rendering report from the additional file-loading and saving claim; done means each reproduced behavior has a confirmed fix or a clearly documented limitation.