I've posted this before but I'll put it up again, will have to add it to my HPS site or get Brett to update his list.
Rolf's files available on Brett's site
http://www.brettschulte.net/ACWCGDC/rol ... aphics.htmSet A - made for Franklin and should also work for Chickamaugua, Atlanta, Vicksburg, Gettysburg and Corinth 1.01 as they all use the same 3d units.bmp files.
Set B – made for Ozark and Corinth 1.02
Set C – This is the Franklin set I modified to work with Penninsula.
Set D – made for Shiloh and should work for Chancellorsville and Antietam since they also use the same files.
Overland would be compatible with either Set A or Set D at Brett's site. They both use the same 12 3DUnits files which appear to match the Overland set in number of lines and which side they belong to although Rolf's 3DUnitsa files (guns) have 3 additional lines at the bottom of the file these would have no affect since the Overland OOBs will not call for them anyway. However I have not had time to check the Overland OOB's so there may be units with the wrong uniform/flag in the mix.
Set A also changes the 3DSymbols and 3DBlocked files while
Set D changes the 3DSymbols, 3DFeatures, 3DGround, 3DTrees & 3D Water files so Set D will also change the look of the buildings and terrain.
Back up your files just in case.