Hi Voodoodad:
Thanks for stopping by and the nice comment.
For the drive belt flywheel I start with a Ring3D > Initialize > Change LDivide to 256 & SRadius at (smaller-your choice) like 15 or so > Deformation > Flatten Z (both sides equally) > SFlatten XY (negative a little to remove the curvature on the outside) > Masking > set Sel and Skp to 3 > hit the Mask All > then hit Col > then Ctrl Masking and change to Mask Circle and stroke to Circle with the Square and Center buttons click on > then Mask off the inside half or so of the ring so that on the outside of the ring (only) so you have alternating masked and unmasked areas (remember you can move that masking circle around by holding down shift) > Deformation Inflate XY to + (approximately) 33 (turn off View Mask and Polyframe to see if it looks the way you want it to) > if so Clear Mask in the Masking subpallet > Deformation > Size Z (widen to your preference) > click the Make Polymesh3D after your happy with the results.
For the circular part of the drive belt that goes around the above flywheel subtool: do NOT mask the inside of the 3D ring with the trl masking as described above just Deformation > Inflate XY > then Deformation SFlatten XY (as required to flatten the outside edge again).
For the straight parts of the drive belt I just made a cube > I extruded several times on the X axis using the ctrl and transpose move (enough times that I felt when I subdivided I’d have plenty of divisions along that X axis and fewer on the Y and Z. > I size that (now elongated on the X axis) cube until it;s about the size of the belt that you made on the flywheel and with enough subdivisions that 3 edge loops equal approximatly the width of the teeth on the ring belt on the flywheel. > Then I masked off the top 1/2 along the x axis and then masked every other three polygon widths long the X Axis until it looks like your ring after you used the circle mask on the inside of the ring in the top paragraph. > Deformation > use either Offset -Y or Inflate Y > Duplicate and rotate the duplicate 180 degrees on the X axis and use for the other straight part you’ll need.
Then you need to position the straight belt parts to the ring belt part > slice cut both the circular belt part and the two straight belt parts as required so that they appear correctly positioned > Merge the thre parts (or 4 if you’ve created another flywheel/ring belt) then remesh (at a high polycount).
That’s all there is to it. lol.
Have fun Zbrushing
Ezra