You need a GeForce 3 or above (not 4 MX) to get the yellow treasure chest light with Jabo's D3D6 1.5+. Use a different video plugin or an earlier version of Jabo's to see yellow light (hard to recommend one without knowing which gfx card you have though!) If you have a GeForce 2/4 MX or earlier, I strongly recommend glN64().
Goron, in a earlier thread i said that i had this same videocard (GeF2mx400) and for me too, it worked fine, i guess the problem is on NV17 (GeF2GTS and GeF4mx440) not on NV11 (Your card).
I had a similiar problem with the old family computer that I used, it had a crappy ATI card in it. Now with my PC and my Radeon 9500, I havne't had any black stuff problems, other things on the other hand, yes...