private static IEnumerator partsCombiner(Request request, List <ViewPart> parts, int maxAtlasDimension)
{
yield return(null);
Combine.CalculateAtlasLayout(parts, out int curSize);
yield return(null);
int renderTextureSize = Mathf.Min(Mathf.ClosestPowerOfTwo(curSize), maxAtlasDimension);
request.Atlas = new RenderTexture(renderTextureSize, renderTextureSize, 0, RenderTextureFormat.ARGB32);
request.Atlas.isPowerOfTwo = true;
request.Atlas.filterMode = FilterMode.Bilinear;
request.Atlas.useMipMap = false;
yield return(null);
}