o3d textures and transparency

Question

I'm working at galery on o3d(plagin version) and I need make photos transparent. Photos are on hud. Here is some code:

g_canvasInfoPict = o3djs.canvas.create(g_pack, g_hudRoot, g_hudViewInfo);

alphaParam = g_canvasInfoPict.transparentState_.getStateParam("o3d.AlphaReference");
alphaParam.value = 0.5;

alphaParam = g_canvasInfoPict.transparentState_.getStateParam("o3d.BlendAlphaEquation");
alphaParam.value = g_o3d.State.BLEND_SUBTRACT;

alphaParam = g_canvasInfoPict.transparentState_.getStateParam("o3d.SourceBlendFunction");
alphaParam.value = g_o3d.State.BLENDFUNC_ONE;

paramOne = g_canvasInfoPict.transparentState_.getStateParam("o3d.DestinationBlendFunction");
paramOne.value = g_o3d.State.BLENDFUNC_DESTINATION_ALPHA;//or BLENDFUNC_SOURCE_ALPHA or BLENDFUNC_SOURCE_ALPHA_SATUTRATE or BLENDFUNC_ONE or BLENDFUNC_ZERO

g_fullPictCanvas = g_canvasInfoPict.createXYQuad(paddingX, paddingY, -14, g_fullPictTexture.width, g_fullPictTexture.height, true);

g_fullPictCanvas.canvas.drawBitmap(g_fullPictTexture, 0, g_fullPictTexture.height);
g_fullPictCanvas.updateTexture();

But it doesn't work. When setting paramOne.value = BLENDFUNC_ZERO photo displays (non-transparent)

paramOne.value = BLENDFUNC_ONE photo isn't displayed (full transparent)

So how to achive intermediate result?

Answer 1

Given that the O3D plug-in is deprecated in favor of the WebGL-based O3D, is it an option for you to migrate to the latter?

If so, you can inquire in the discussion group about the transparency issue (if it still exists under O3D-WebGL). The developers are very responsive.