Program to render 3D from aerial + DEM

[Steve Lewis]

Hi guys,

I am looking for an open source or freeware program that can render high
resolution views of an aerial photo (geotiff) on top of a DEM (geotiff).

I tried 3Dem and while it can render high resolution it only interpolates at
the higher resolution so the generated views are not printable. It also is
no longer supported.

I need to generate high resolution (4,000 x 3,000 pixel view of a landscape
for a project. The only programs I can find are $200+ plus and there is no
budget for this project. Surely there must be some software around that can
do the above? Low cost or freeware?

Thanks for any help on this - I should just about offer a finder's fee!

Thanks, Steve