Here is a .obj file loader. It will load obj files with UV coordinates exported by Blender, but it will only read lines that start with v, vt or f. It uses a 128x128 texture, but if you use another it will need to be flipped vertically.
Usage is pretty straight forward. Select a file to load. Press the "load" button then the "prime" button, and viola!
obj loader cap:
blender exported obj file (texture already in cap):
It serves as a nice benchmark for Construct. I get about 25 fps with the bear.obj file. What do you get?
On a side note I notice construct is able to add files to a cap through the project bar. It would be a useful feature if the added files were accessible at runtime, but there seems to be no way to access them.