I have this model of starship enterprise all textured and set up. I wish to move over to EEVEE but heard that there is 0 compatibility between internal and eevee. Is that true? How can the model be changed into EEVEE engine?
Before 2.8 there was addons to convert Blender Internal materials into Cycles materials. But in 2.8 none of those addons have been upgraded to the new addon API changes yet. You could wait until one is upgraded.
In the meantime, you can simply make yourself a separate installation of Blender 2.79 and use its integrated Material Utils addon to convert your Internal materials into Cycles. Then append the Cycles material into your 2.8 scene. Cycles materials are mostly compatible with Eevee, so there shouldn't be much issues switching from Cycles to Eevee.
There are no major issues when switching from Cycle render to EEVEE render. But there are a few things to keep in mind like: - Light (reduce the light intensity when switching to EEVEE, including the light of the world) - Materials do not change much except glass materials. You can turn on "Refraction" to increase the reflection. Hope to help you