J3D File Format

[HoneyFox]

Originally Posted by faxnico

Debugging and offline/static analysis.
I had this sorted out a while ago to code a J3D loader replacement with something more modern (GLTF).
+0x294 was an offset to the runtime structure indeed (S3DModel).
The model/mesh/subset data size is 0x60 bytes.
The render state change that wrapped that 2nd drawprimup was, on the other hand:
SetRenderState(D3DRS_ZFUNC, D3DCMP_NEVER);
DPUP();
SetRenderState(D3DRS_ZFUNC, D3DCMP_LESS);
SetRenderState(D3DRS_ZENABLE, TRUE);
Maybe for some decals rendering, I don't know.

This additional 2nd DPUP is rendered with ZFunc = Never? If ZTest is enabled previously, nothing will be drawn then. That's quite strange, even for decal/VFX/... transparent mesh rendering (They usually have ZENABLE = True, ZFunc = Less/LEqual and ZWRITEENABLE = False). Does it instead have any stencil-test related API call nearby?