ReadStep Have no lighting display effect,but use ReadObj have lighting display effect?

admin

I use the following code to read the step file, and the result is no lighting display effect, but I use the following code to read the obj file, and the lighting display effect appears. What should I do if I want to read a display step file and have a lighting display? The STEP file and the OBJ file are the same file in different formats!

pload ALL
ReadStep D D:/maichongchuanganqi.step
XDisplay -dispMode 1 D
vfit

vinit
pload ALL
ReadObj DD D:/maichongchuanganqi.obj
XDisplay -dispMode 1 DD
vfit

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