Left, the original flat greytone bump map. Middle, a single spotlight bump over the image centre. Right, a double spot bump from two differevt angles.

Corel Photo-Paint: Effects/Render/Lighting Effects.

Although not suitable for seamless tiles, this little technique could come in handy for a background or small logo. The pictures below show the settings to achieve both a single and double spotlight bump. These settings can be be tweaked to suit your own subject. The spotlight handles in the preview windows control the size and direction of the individual lights. Your settings can be saved for future use in the preset 'Style' drop-down.

Above, The Photo-Paint dialogue box settings for a single spotlight bump, Below, settings for a two spot bump, one from top left and one from bottom right. Note I used three of each light colour, here, to spread the light out a bit.

		Adobe Photoshop: Filter/Render/Lighting Effects The Adobe version behaves a little different to Corel, but the end result is still the same if not a little better. The dialogue box captures show the settings both single (right) and double (below) spot bumps. The spotlight handles in the preview windows control the size and direction of the light. Note: to work as a bump the Texture Channel drop-down needs to be set to red.

 

Top left, Examples of a single and double spot bump to the basic greyscale image at the top of the page. Above, Settings for a single spot, in this case directly over the centre of the image. Below left and right, Dialogue settings for a double spot